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partition.cpp
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partition.cpp
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/*
Copyright 2013 to 2016 TeamWin
This file is part of TWRP/TeamWin Recovery Project.
TWRP is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
TWRP is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with TWRP. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/vfs.h>
#include <sys/mount.h>
#include <unistd.h>
#include <dirent.h>
#include <libgen.h>
#include <zlib.h>
#include <iostream>
#include <sstream>
#include <sys/param.h>
#include <fcntl.h>
#ifdef TW_INCLUDE_CRYPTO
#include "cutils/properties.h"
#endif
#include "libblkid/include/blkid.h"
#include "variables.h"
#include "twcommon.h"
#include "partitions.hpp"
#include "data.hpp"
#include "twrp-functions.hpp"
#include "twrpDigest.hpp"
#include "twrpTar.hpp"
#include "exclude.hpp"
#include "infomanager.hpp"
#include "set_metadata.h"
#include "gui/gui.hpp"
#include "adbbu/libtwadbbu.hpp"
extern "C" {
#include "mtdutils/mtdutils.h"
#include "mtdutils/mounts.h"
#ifdef USE_EXT4
#include "make_ext4fs.h"
#endif
#ifdef TW_INCLUDE_CRYPTO
#include "crypto/lollipop/cryptfs.h"
#include "gpt/gpt.h"
#ifdef TW_INCLUDE_FBE
#include "crypto/ext4crypt/Decrypt.h"
#endif
#else
#define CRYPT_FOOTER_OFFSET 0x4000
#endif
}
#include <selinux/selinux.h>
#include <selinux/label.h>
#ifdef HAVE_CAPABILITIES
#include <sys/capability.h>
#include <sys/xattr.h>
#include <linux/xattr.h>
#endif
#include <sparse_format.h>
#include "progresstracking.hpp"
using namespace std;
extern struct selabel_handle *selinux_handle;
extern bool datamedia;
struct flag_list {
const char *name;
unsigned flag;
};
const struct flag_list mount_flags[] = {
{ "noatime", MS_NOATIME },
{ "noexec", MS_NOEXEC },
{ "nosuid", MS_NOSUID },
{ "nodev", MS_NODEV },
{ "nodiratime", MS_NODIRATIME },
{ "ro", MS_RDONLY },
{ "rw", 0 },
{ "remount", MS_REMOUNT },
{ "bind", MS_BIND },
{ "rec", MS_REC },
#ifdef MS_UNBINDABLE
{ "unbindable", MS_UNBINDABLE },
#endif
#ifdef MS_PRIVATE
{ "private", MS_PRIVATE },
#endif
#ifdef MS_SLAVE
{ "slave", MS_SLAVE },
#endif
#ifdef MS_SHARED
{ "shared", MS_SHARED },
#endif
{ "sync", MS_SYNCHRONOUS },
{ "defaults", 0 },
{ 0, 0 },
};
enum TW_FSTAB_FLAGS {
TWFLAG_DEFAULTS, // Retain position
TWFLAG_ANDSEC,
TWFLAG_BACKUP,
TWFLAG_BACKUPNAME,
TWFLAG_BLOCKSIZE,
TWFLAG_CANBEWIPED,
TWFLAG_CANENCRYPTBACKUP,
TWFLAG_DISPLAY,
TWFLAG_ENCRYPTABLE,
TWFLAG_FLASHIMG,
TWFLAG_FORCEENCRYPT,
TWFLAG_FSFLAGS,
TWFLAG_IGNOREBLKID,
TWFLAG_LENGTH,
TWFLAG_MOUNTTODECRYPT,
TWFLAG_REMOVABLE,
TWFLAG_RETAINLAYOUTVERSION,
TWFLAG_SETTINGSSTORAGE,
TWFLAG_STORAGE,
TWFLAG_STORAGENAME,
TWFLAG_SUBPARTITIONOF,
TWFLAG_SYMLINK,
TWFLAG_USERDATAENCRYPTBACKUP,
TWFLAG_USERMRF,
TWFLAG_WIPEDURINGFACTORYRESET,
TWFLAG_WIPEINGUI,
TWFLAG_SLOTSELECT,
};
/* Flags without a trailing '=' are considered dual format flags and can be
* written as either 'flagname' or 'flagname=', where the character following
* the '=' is Y,y,1 for true and false otherwise.
*/
const struct flag_list tw_flags[] = {
{ "andsec", TWFLAG_ANDSEC },
{ "backup", TWFLAG_BACKUP },
{ "backupname=", TWFLAG_BACKUPNAME },
{ "blocksize=", TWFLAG_BLOCKSIZE },
{ "canbewiped", TWFLAG_CANBEWIPED },
{ "canencryptbackup", TWFLAG_CANENCRYPTBACKUP },
{ "defaults", TWFLAG_DEFAULTS },
{ "display=", TWFLAG_DISPLAY },
{ "encryptable=", TWFLAG_ENCRYPTABLE },
{ "flashimg", TWFLAG_FLASHIMG },
{ "forceencrypt=", TWFLAG_FORCEENCRYPT },
{ "fsflags=", TWFLAG_FSFLAGS },
{ "ignoreblkid", TWFLAG_IGNOREBLKID },
{ "length=", TWFLAG_LENGTH },
{ "mounttodecrypt", TWFLAG_MOUNTTODECRYPT },
{ "removable", TWFLAG_REMOVABLE },
{ "retainlayoutversion", TWFLAG_RETAINLAYOUTVERSION },
{ "settingsstorage", TWFLAG_SETTINGSSTORAGE },
{ "storage", TWFLAG_STORAGE },
{ "storagename=", TWFLAG_STORAGENAME },
{ "subpartitionof=", TWFLAG_SUBPARTITIONOF },
{ "symlink=", TWFLAG_SYMLINK },
{ "userdataencryptbackup", TWFLAG_USERDATAENCRYPTBACKUP },
{ "usermrf", TWFLAG_USERMRF },
{ "wipeduringfactoryreset", TWFLAG_WIPEDURINGFACTORYRESET },
{ "wipeingui", TWFLAG_WIPEINGUI },
{ "slotselect", TWFLAG_SLOTSELECT },
{ 0, 0 },
};
TWPartition::TWPartition() {
Can_Be_Mounted = false;
Can_Be_Wiped = false;
Can_Be_Backed_Up = false;
Use_Rm_Rf = false;
Wipe_During_Factory_Reset = false;
Wipe_Available_in_GUI = false;
Is_SubPartition = false;
Has_SubPartition = false;
SubPartition_Of = "";
Symlink_Path = "";
Symlink_Mount_Point = "";
Mount_Point = "";
Backup_Path = "";
Actual_Block_Device = "";
Primary_Block_Device = "";
Alternate_Block_Device = "";
Removable = false;
Is_Present = false;
Length = 0;
Size = 0;
Used = 0;
Free = 0;
Backup_Size = 0;
Can_Be_Encrypted = false;
Is_Encrypted = false;
Is_Decrypted = false;
Is_FBE = false;
Mount_To_Decrypt = false;
Decrypted_Block_Device = "";
Display_Name = "";
Backup_Display_Name = "";
Storage_Name = "";
Backup_Name = "";
Backup_FileName = "";
MTD_Name = "";
Backup_Method = BM_NONE;
Can_Encrypt_Backup = false;
Use_Userdata_Encryption = false;
Has_Data_Media = false;
Has_Android_Secure = false;
Is_Storage = false;
Is_Settings_Storage = false;
Storage_Path = "";
Current_File_System = "";
Fstab_File_System = "";
Mount_Flags = 0;
Mount_Options = "";
Format_Block_Size = 0;
Ignore_Blkid = false;
Retain_Layout_Version = false;
Crypto_Key_Location = "footer";
MTP_Storage_ID = 0;
Can_Flash_Img = false;
Mount_Read_Only = false;
Is_Adopted_Storage = false;
Adopted_GUID = "";
SlotSelect = false;
}
TWPartition::~TWPartition(void) {
// Do nothing
}
bool TWPartition::Process_Fstab_Line(const char *fstab_line, bool Display_Error) {
char full_line[MAX_FSTAB_LINE_LENGTH];
char twflags[MAX_FSTAB_LINE_LENGTH] = "";
char* ptr;
int line_len = strlen(fstab_line), index = 0, item_index = 0;
bool skip = false;
strlcpy(full_line, fstab_line, sizeof(full_line));
for (index = 0; index < line_len; index++) {
if (full_line[index] == 34)
skip = !skip;
if (!skip && full_line[index] <= 32)
full_line[index] = '\0';
}
Mount_Point = full_line;
LOGINFO("Processing '%s'\n", Mount_Point.c_str());
Backup_Path = Mount_Point;
Storage_Path = Mount_Point;
Display_Name = full_line + 1;
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
index = Mount_Point.size();
while (index < line_len) {
while (index < line_len && full_line[index] == '\0')
index++;
if (index >= line_len)
continue;
ptr = full_line + index;
if (item_index == 0) {
// File System
Fstab_File_System = ptr;
Current_File_System = ptr;
item_index++;
} else if (item_index == 1) {
// Primary Block Device
if (Fstab_File_System == "mtd" || Fstab_File_System == "yaffs2") {
MTD_Name = ptr;
Find_MTD_Block_Device(MTD_Name);
} else if (Fstab_File_System == "bml") {
if (Mount_Point == "/boot")
MTD_Name = "boot";
else if (Mount_Point == "/recovery")
MTD_Name = "recovery";
Primary_Block_Device = ptr;
if (*ptr != '/')
LOGERR("Until we get better BML support, you will have to find and provide the full block device path to the BML devices e.g. /dev/block/bml9 instead of the partition name\n");
} else if (*ptr != '/') {
if (Display_Error)
LOGERR("Invalid block device '%s' in fstab line '%s'", ptr, fstab_line);
else
LOGINFO("Invalid block device '%s' in fstab line '%s'", ptr, fstab_line);
return false;
} else {
Primary_Block_Device = ptr;
Find_Real_Block_Device(Primary_Block_Device, Display_Error);
}
item_index++;
} else if (item_index > 1) {
if (*ptr == '/') {
// Alternate Block Device
Alternate_Block_Device = ptr;
Find_Real_Block_Device(Alternate_Block_Device, Display_Error);
} else if (strlen(ptr) > 7 && strncmp(ptr, "length=", 7) == 0) {
// Partition length
ptr += 7;
Length = atoi(ptr);
} else if (strlen(ptr) > 6 && strncmp(ptr, "flags=", 6) == 0) {
// Custom flags, save for later so that new values aren't overwritten by defaults
ptr += 6;
strlcpy(twflags, ptr, sizeof(twflags));
} else if (strlen(ptr) == 4 && (strncmp(ptr, "NULL", 4) == 0 || strncmp(ptr, "null", 4) == 0 || strncmp(ptr, "null", 4) == 0)) {
// Do nothing
} else {
// Unhandled data
LOGINFO("Unhandled fstab information '%s' in fstab line '%s'\n", ptr, fstab_line);
}
}
while (index < line_len && full_line[index] != '\0')
index++;
}
if (!Is_File_System(Fstab_File_System) && !Is_Image(Fstab_File_System)) {
if (Display_Error)
LOGERR("Unknown File System: '%s'\n", Fstab_File_System.c_str());
else
LOGINFO("Unknown File System: '%s'\n", Fstab_File_System.c_str());
return false;
} else if (Is_File_System(Fstab_File_System)) {
Find_Actual_Block_Device();
Setup_File_System(Display_Error);
if (Mount_Point == "/system") {
Display_Name = "System";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Wipe_Available_in_GUI = true;
Can_Be_Backed_Up = true;
Mount_Read_Only = true;
} else if (Mount_Point == "/data") {
Display_Name = "Data";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Wipe_Available_in_GUI = true;
Wipe_During_Factory_Reset = true;
Can_Be_Backed_Up = true;
Can_Encrypt_Backup = true;
Use_Userdata_Encryption = true;
} else if (Mount_Point == "/cache") {
Display_Name = "Cache";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Wipe_Available_in_GUI = true;
Wipe_During_Factory_Reset = true;
Can_Be_Backed_Up = true;
} else if (Mount_Point == "/datadata") {
Wipe_During_Factory_Reset = true;
Display_Name = "DataData";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Is_SubPartition = true;
SubPartition_Of = "/data";
DataManager::SetValue(TW_HAS_DATADATA, 1);
Can_Be_Backed_Up = true;
Can_Encrypt_Backup = true;
Use_Userdata_Encryption = false; // This whole partition should be encrypted
} else if (Mount_Point == "/sd-ext") {
Wipe_During_Factory_Reset = true;
Display_Name = "SD-Ext";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Wipe_Available_in_GUI = true;
Removable = true;
Can_Be_Backed_Up = true;
Can_Encrypt_Backup = true;
Use_Userdata_Encryption = true;
} else if (Mount_Point == "/boot") {
Display_Name = "Boot";
Backup_Display_Name = Display_Name;
DataManager::SetValue("tw_boot_is_mountable", 1);
Can_Be_Backed_Up = true;
} else if (Mount_Point == "/vendor") {
Display_Name = "Vendor";
Backup_Display_Name = Display_Name;
Storage_Name = Display_Name;
Mount_Read_Only = true;
}
#ifdef TW_EXTERNAL_STORAGE_PATH
if (Mount_Point == EXPAND(TW_EXTERNAL_STORAGE_PATH)) {
Is_Storage = true;
Storage_Path = EXPAND(TW_EXTERNAL_STORAGE_PATH);
Removable = true;
Wipe_Available_in_GUI = true;
#else
if (Mount_Point == "/sdcard" || Mount_Point == "/external_sd" || Mount_Point == "/external_sdcard") {
Is_Storage = true;
Removable = true;
Wipe_Available_in_GUI = true;
#endif
}
#ifdef TW_INTERNAL_STORAGE_PATH
if (Mount_Point == EXPAND(TW_INTERNAL_STORAGE_PATH)) {
Is_Storage = true;
Is_Settings_Storage = true;
Storage_Path = EXPAND(TW_INTERNAL_STORAGE_PATH);
Wipe_Available_in_GUI = true;
}
#else
if (Mount_Point == "/emmc" || Mount_Point == "/internal_sd" || Mount_Point == "/internal_sdcard") {
Is_Storage = true;
Is_Settings_Storage = true;
Wipe_Available_in_GUI = true;
}
#endif
} else if (Is_Image(Fstab_File_System)) {
Find_Actual_Block_Device();
Setup_Image();
if (Mount_Point == "/boot") {
Display_Name = "Boot";
Backup_Display_Name = Display_Name;
Can_Be_Backed_Up = true;
Can_Flash_Img = true;
} else if (Mount_Point == "/recovery") {
Display_Name = "Recovery";
Backup_Display_Name = Display_Name;
Can_Flash_Img = true;
} else if (Mount_Point == "/system_image") {
Display_Name = "System Image";
Backup_Display_Name = Display_Name;
Can_Flash_Img = true;
Can_Be_Backed_Up = true;
} else if (Mount_Point == "/vendor_image") {
Display_Name = "Vendor Image";
Backup_Display_Name = Display_Name;
Can_Flash_Img = true;
Can_Be_Backed_Up = true;
}
}
// Process TWRP fstab flags
if (strlen(twflags) > 0) {
string Prev_Display_Name = Display_Name;
string Prev_Storage_Name = Storage_Name;
string Prev_Backup_Display_Name = Backup_Display_Name;
Display_Name = "";
Storage_Name = "";
Backup_Display_Name = "";
Process_TW_Flags(twflags, Display_Error);
bool has_display_name = !Display_Name.empty();
bool has_storage_name = !Storage_Name.empty();
bool has_backup_name = !Backup_Display_Name.empty();
if (!has_display_name) Display_Name = Prev_Display_Name;
if (!has_storage_name) Storage_Name = Prev_Storage_Name;
if (!has_backup_name) Backup_Display_Name = Prev_Backup_Display_Name;
if (has_display_name && !has_storage_name)
Storage_Name = Display_Name;
if (!has_display_name && has_storage_name)
Display_Name = Storage_Name;
if (has_display_name && !has_backup_name && Backup_Display_Name != "Android Secure")
Backup_Display_Name = Display_Name;
if (!has_display_name && has_backup_name)
Display_Name = Backup_Display_Name;
}
return true;
}
void TWPartition::Partition_Post_Processing(bool Display_Error) {
if (Mount_Point == "/data")
Setup_Data_Partition(Display_Error);
else if (Mount_Point == "/cache")
Setup_Cache_Partition(Display_Error);
}
void TWPartition::ExcludeAll(const string& path) {
backup_exclusions.add_absolute_dir(path);
wipe_exclusions.add_absolute_dir(path);
}
void TWPartition::Setup_Data_Partition(bool Display_Error) {
if (Mount_Point != "/data")
return;
// Ensure /data is not mounted as tmpfs for qcom hardware decrypt
UnMount(false);
#ifdef TW_INCLUDE_CRYPTO
if (datamedia)
Setup_Data_Media();
Can_Be_Encrypted = true;
char crypto_blkdev[255];
property_get("ro.crypto.fs_crypto_blkdev", crypto_blkdev, "error");
if (strcmp(crypto_blkdev, "error") != 0) {
DataManager::SetValue(TW_IS_DECRYPTED, 1);
Is_Encrypted = true;
Is_Decrypted = true;
Is_FBE = false;
DataManager::SetValue(TW_IS_FBE, 0);
Decrypted_Block_Device = crypto_blkdev;
LOGINFO("Data already decrypted, new block device: '%s'\n", crypto_blkdev);
} else if (!Mount(false)) {
if (Is_Present) {
set_partition_data(Actual_Block_Device.c_str(), Crypto_Key_Location.c_str(), Fstab_File_System.c_str());
if (cryptfs_check_footer() == 0) {
Is_Encrypted = true;
Is_Decrypted = false;
Can_Be_Mounted = false;
Current_File_System = "emmc";
Setup_Image();
DataManager::SetValue(TW_IS_ENCRYPTED, 1);
DataManager::SetValue(TW_CRYPTO_PWTYPE, cryptfs_get_password_type());
DataManager::SetValue(TW_CRYPTO_PASSWORD, "");
DataManager::SetValue("tw_crypto_display", "");
} else {
gui_err("mount_data_footer=Could not mount /data and unable to find crypto footer.");
}
} else {
LOGERR("Primary block device '%s' for mount point '%s' is not present!\n", Primary_Block_Device.c_str(), Mount_Point.c_str());
}
} else {
if (TWFunc::Path_Exists("/data/unencrypted/key/version")) {
LOGINFO("File Based Encryption is present\n");
#ifdef TW_INCLUDE_FBE
ExcludeAll(Mount_Point + "/convert_fbe");
ExcludeAll(Mount_Point + "/unencrypted");
//ExcludeAll(Mount_Point + "/system/users/0"); // we WILL need to retain some of this if multiple users are present or we just need to delete more folders for the extra users somewhere else
ExcludeAll(Mount_Point + "/misc/vold/user_keys");
//ExcludeAll(Mount_Point + "/system_ce");
//ExcludeAll(Mount_Point + "/system_de");
//ExcludeAll(Mount_Point + "/misc_ce");
//ExcludeAll(Mount_Point + "/misc_de");
ExcludeAll(Mount_Point + "/system/gatekeeper.password.key");
ExcludeAll(Mount_Point + "/system/gatekeeper.pattern.key");
ExcludeAll(Mount_Point + "/system/locksettings.db");
//ExcludeAll(Mount_Point + "/system/locksettings.db-shm"); // don't seem to need this one, but the other 2 are needed
ExcludeAll(Mount_Point + "/system/locksettings.db-wal");
//ExcludeAll(Mount_Point + "/user_de");
//ExcludeAll(Mount_Point + "/misc/profiles/cur/0"); // might be important later
ExcludeAll(Mount_Point + "/misc/gatekeeper");
ExcludeAll(Mount_Point + "/drm/kek.dat");
int retry_count = 3;
while (!Decrypt_DE() && --retry_count)
usleep(2000);
if (retry_count > 0) {
property_set("ro.crypto.state", "encrypted");
Is_Encrypted = true;
Is_Decrypted = false;
Is_FBE = true;
DataManager::SetValue(TW_IS_FBE, 1);
DataManager::SetValue(TW_IS_ENCRYPTED, 1);
string filename;
DataManager::SetValue(TW_CRYPTO_PWTYPE, Get_Password_Type(0, filename));
DataManager::SetValue(TW_CRYPTO_PASSWORD, "");
DataManager::SetValue("tw_crypto_display", "");
}
#else
LOGERR("FBE found but FBE support not present in TWRP\n");
#endif
} else {
// Filesystem is not encrypted and the mount succeeded, so return to
// the original unmounted state
UnMount(false);
}
}
if (datamedia && (!Is_Encrypted || (Is_Encrypted && Is_Decrypted))) {
Setup_Data_Media();
Recreate_Media_Folder();
}
#else
if (datamedia) {
Setup_Data_Media();
Recreate_Media_Folder();
}
#endif
}
void TWPartition::Setup_Cache_Partition(bool Display_Error __unused) {
if (Mount_Point != "/cache")
return;
if (!Mount(true))
return;
if (!TWFunc::Path_Exists("/cache/recovery/.")) {
LOGINFO("Recreating /cache/recovery folder\n");
if (mkdir("/cache/recovery", S_IRWXU | S_IRWXG | S_IWGRP | S_IXGRP) != 0)
LOGERR("Could not create /cache/recovery\n");
}
}
void TWPartition::Process_FS_Flags(const char *str) {
char *options = strdup(str);
char *ptr, *savep;
Mount_Options = "";
// Avoid issues with potentially nested strtok by using strtok_r
ptr = strtok_r(options, ",", &savep);
while (ptr) {
const struct flag_list* mount_flag = mount_flags;
for (; mount_flag->name; mount_flag++) {
// mount_flags are never postfixed by '=',
// so only match identical strings (including length)
if (strcmp(ptr, mount_flag->name) == 0) {
Mount_Flags |= mount_flag->flag;
break;
}
}
if (mount_flag->flag == MS_RDONLY)
Mount_Read_Only = true;
if (mount_flag->name != 0) {
if (!Mount_Options.empty())
Mount_Options += ",";
Mount_Options += mount_flag->name;
} else {
LOGINFO("Unhandled mount flag: '%s'\n", ptr);
}
ptr = strtok_r(NULL, ",", &savep);
}
free(options);
}
void TWPartition::Apply_TW_Flag(const unsigned flag, const char* str, const bool val) {
switch (flag) {
case TWFLAG_ANDSEC:
Has_Android_Secure = val;
break;
case TWFLAG_BACKUP:
Can_Be_Backed_Up = val;
break;
case TWFLAG_BACKUPNAME:
Backup_Display_Name = str;
break;
case TWFLAG_BLOCKSIZE:
Format_Block_Size = (unsigned long)(atol(str));
break;
case TWFLAG_CANBEWIPED:
Can_Be_Wiped = val;
break;
case TWFLAG_CANENCRYPTBACKUP:
Can_Encrypt_Backup = val;
break;
case TWFLAG_DEFAULTS:
// Do nothing
break;
case TWFLAG_DISPLAY:
Display_Name = str;
break;
case TWFLAG_ENCRYPTABLE:
case TWFLAG_FORCEENCRYPT:
Crypto_Key_Location = str;
break;
case TWFLAG_FLASHIMG:
Can_Flash_Img = val;
break;
case TWFLAG_FSFLAGS:
Process_FS_Flags(str);
break;
case TWFLAG_IGNOREBLKID:
Ignore_Blkid = val;
break;
case TWFLAG_LENGTH:
Length = atoi(str);
break;
case TWFLAG_MOUNTTODECRYPT:
Mount_To_Decrypt = val;
break;
case TWFLAG_REMOVABLE:
Removable = val;
break;
case TWFLAG_RETAINLAYOUTVERSION:
Retain_Layout_Version = val;
break;
case TWFLAG_SETTINGSSTORAGE:
Is_Settings_Storage = val;
if (Is_Settings_Storage)
Is_Storage = true;
break;
case TWFLAG_STORAGE:
Is_Storage = val;
break;
case TWFLAG_STORAGENAME:
Storage_Name = str;
break;
case TWFLAG_SUBPARTITIONOF:
Is_SubPartition = true;
SubPartition_Of = str;
break;
case TWFLAG_SYMLINK:
Symlink_Path = str;
break;
case TWFLAG_USERDATAENCRYPTBACKUP:
Use_Userdata_Encryption = val;
if (Use_Userdata_Encryption)
Can_Encrypt_Backup = true;
break;
case TWFLAG_USERMRF:
Use_Rm_Rf = val;
break;
case TWFLAG_WIPEDURINGFACTORYRESET:
Wipe_During_Factory_Reset = val;
if (Wipe_During_Factory_Reset) {
Can_Be_Wiped = true;
Wipe_Available_in_GUI = true;
}
break;
case TWFLAG_WIPEINGUI:
Wipe_Available_in_GUI = val;
if (Wipe_Available_in_GUI)
Can_Be_Wiped = true;
break;
case TWFLAG_SLOTSELECT:
SlotSelect = true;
break;
default:
// Should not get here
LOGINFO("Flag identified for processing, but later unmatched: %i\n", flag);
break;
}
}
void TWPartition::Process_TW_Flags(char *flags, bool Display_Error) {
char separator[2] = {'\n', 0};
char *ptr, *savep;
// Semicolons within double-quotes are not forbidden, so replace
// only the semicolons intended as separators with '\n' for strtok
for (unsigned i = 0, skip = 0; i < strlen(flags); i++) {
if (flags[i] == '\"')
skip = !skip;
if (!skip && flags[i] == ';')
flags[i] = separator[0];
}
// Avoid issues with potentially nested strtok by using strtok_r
ptr = strtok_r(flags, separator, &savep);
while (ptr) {
int ptr_len = strlen(ptr);
const struct flag_list* tw_flag = tw_flags;
for (; tw_flag->name; tw_flag++) {
int flag_len = strlen(tw_flag->name);
if (strncmp(ptr, tw_flag->name, flag_len) == 0) {
bool flag_val = false;
if (ptr_len > flag_len && (tw_flag->name)[flag_len-1] != '='
&& ptr[flag_len] != '=') {
// Handle flags with same starting string
// (e.g. backup and backupname)
continue;
} else if (ptr_len > flag_len && ptr[flag_len] == '=') {
// Handle flags with dual format: Part 1
// (e.g. backup and backup=y. backup=y handled here)
ptr += flag_len + 1;
TWFunc::Strip_Quotes(ptr);
// Skip flags with empty argument
// (e.g. backup=)
if (strlen(ptr) == 0) {
LOGINFO("Flag missing argument or should not include '=': %s=\n", tw_flag->name);
break;
}
flag_val = strchr("yY1", *ptr) != NULL;
} else if (ptr_len == flag_len
&& (tw_flag->name)[flag_len-1] == '=') {
// Skip flags missing argument after =
// (e.g. backupname=)
LOGINFO("Flag missing argument: %s\n", tw_flag->name);
break;
} else if (ptr_len > flag_len
&& (tw_flag->name)[flag_len-1] == '=') {
// Handle arguments to flags
// (e.g. backupname="My Stuff")
ptr += flag_len;
TWFunc::Strip_Quotes(ptr);
// Skip flags with empty argument
// (e.g. backupname="")
if (strlen(ptr) == 0) {
LOGINFO("Flag missing argument: %s\n", tw_flag->name);
break;
}
} else if (ptr_len == flag_len) {
// Handle flags with dual format: Part 2
// (e.g. backup and backup=y. backup handled here)
flag_val = true;
} else {
LOGINFO("Flag matched, but could not be processed: %s\n", ptr);
break;
}
Apply_TW_Flag(tw_flag->flag, ptr, flag_val);
break;
}
}
if (tw_flag->name == 0) {
if (Display_Error)
LOGERR("Unhandled flag: '%s'\n", ptr);
else
LOGINFO("Unhandled flag: '%s'\n", ptr);
}
ptr = strtok_r(NULL, separator, &savep);
}
}
bool TWPartition::Is_File_System(string File_System) {
if (File_System == "ext2" ||
File_System == "ext3" ||
File_System == "ext4" ||
File_System == "vfat" ||
File_System == "ntfs" ||
File_System == "yaffs2" ||
File_System == "exfat" ||
File_System == "f2fs" ||
File_System == "auto")
return true;
else
return false;
}
bool TWPartition::Is_Image(string File_System) {
if (File_System == "emmc" || File_System == "mtd" || File_System == "bml")
return true;
else
return false;
}
bool TWPartition::Make_Dir(string Path, bool Display_Error) {
if (TWFunc::Get_D_Type_From_Stat(Path) != S_IFDIR)
unlink(Path.c_str());
if (!TWFunc::Path_Exists(Path)) {
if (mkdir(Path.c_str(), 0777) == -1) {
if (Display_Error)
gui_msg(Msg(msg::kError, "create_folder_strerr=Can not create '{1}' folder ({2}).")(Path)(strerror(errno)));
else
LOGINFO("Can not create '%s' folder.\n", Path.c_str());
return false;
} else {
LOGINFO("Created '%s' folder.\n", Path.c_str());
return true;
}
}
return true;
}
void TWPartition::Setup_File_System(bool Display_Error) {
Can_Be_Mounted = true;
Can_Be_Wiped = true;
// Make the mount point folder if it doesn't exist
Make_Dir(Mount_Point, Display_Error);
Display_Name = Mount_Point.substr(1, Mount_Point.size() - 1);
Backup_Name = Display_Name;
Backup_Method = BM_FILES;
}
void TWPartition::Setup_Image() {
Display_Name = Mount_Point.substr(1, Mount_Point.size() - 1);
Backup_Name = Display_Name;
if (Current_File_System == "emmc")
Backup_Method = BM_DD;
else if (Current_File_System == "mtd" || Current_File_System == "bml")
Backup_Method = BM_FLASH_UTILS;
else
LOGINFO("Unhandled file system '%s' on image '%s'\n", Current_File_System.c_str(), Display_Name.c_str());
}
void TWPartition::Setup_AndSec(void) {
Backup_Display_Name = "Android Secure";
Backup_Name = "and-sec";
Can_Be_Backed_Up = true;
Has_Android_Secure = true;
Symlink_Path = Mount_Point + "/.android_secure";
Symlink_Mount_Point = "/and-sec";
Backup_Path = Symlink_Mount_Point;
Make_Dir("/and-sec", true);
Recreate_AndSec_Folder();
Mount_Storage_Retry(true);
}
void TWPartition::Setup_Data_Media() {
LOGINFO("Setting up '%s' as data/media emulated storage.\n", Mount_Point.c_str());
if (Storage_Name.empty() || Storage_Name == "Data")
Storage_Name = "Internal Storage";
Has_Data_Media = true;
Is_Storage = true;
Storage_Path = Mount_Point + "/media";
Symlink_Path = Storage_Path;
if (Mount_Point == "/data") {
Is_Settings_Storage = true;
if (strcmp(EXPAND(TW_EXTERNAL_STORAGE_PATH), "/sdcard") == 0) {
Make_Dir("/emmc", false);
Symlink_Mount_Point = "/emmc";
} else {
Make_Dir("/sdcard", false);
Symlink_Mount_Point = "/sdcard";
}
if (Mount(false) && TWFunc::Path_Exists(Mount_Point + "/media/0")) {
Storage_Path = Mount_Point + "/media/0";
Symlink_Path = Storage_Path;
DataManager::SetValue(TW_INTERNAL_PATH, Mount_Point + "/media/0");
UnMount(true);
}
DataManager::SetValue("tw_has_internal", 1);
DataManager::SetValue("tw_has_data_media", 1);
backup_exclusions.add_absolute_dir("/data/data/com.google.android.music/files");
ExcludeAll(Mount_Point + "/misc/vold");
ExcludeAll(Mount_Point + "/.layout_version");
ExcludeAll(Mount_Point + "/system/storage.xml");
} else {
if (Mount(true) && TWFunc::Path_Exists(Mount_Point + "/media/0")) {
Storage_Path = Mount_Point + "/media/0";
Symlink_Path = Storage_Path;
UnMount(true);
}
}
ExcludeAll(Mount_Point + "/media");
}
void TWPartition::Find_Real_Block_Device(string& Block, bool Display_Error) {
char device[512], realDevice[512];
strcpy(device, Block.c_str());
memset(realDevice, 0, sizeof(realDevice));
while (readlink(device, realDevice, sizeof(realDevice)) > 0)
{
strcpy(device, realDevice);
memset(realDevice, 0, sizeof(realDevice));
}
if (device[0] != '/') {
if (Display_Error)
LOGERR("Invalid symlink path '%s' found on block device '%s'\n", device, Block.c_str());
else
LOGINFO("Invalid symlink path '%s' found on block device '%s'\n", device, Block.c_str());
return;
} else {
Block = device;
return;
}
}
bool TWPartition::Mount_Storage_Retry(bool Display_Error) {
// On some devices, storage doesn't want to mount right away, retry and sleep
if (!Mount(Display_Error)) {
int retry_count = 5;
while (retry_count > 0 && !Mount(false)) {
usleep(500000);
retry_count--;
}
return Mount(Display_Error);
}
return true;
}
bool TWPartition::Find_MTD_Block_Device(string MTD_Name) {
FILE *fp = NULL;
char line[255];
fp = fopen("/proc/mtd", "rt");
if (fp == NULL) {
LOGERR("Device does not support /proc/mtd\n");
return false;
}
while (fgets(line, sizeof(line), fp) != NULL)
{
char device[32], label[32];
unsigned long size = 0;
int deviceId;
sscanf(line, "%s %lx %*s %*c%s", device, &size, label);
// Skip header and blank lines
if ((strcmp(device, "dev:") == 0) || (strlen(line) < 8))
continue;
// Strip off the trailing " from the label
label[strlen(label)-1] = '\0';
if (strcmp(label, MTD_Name.c_str()) == 0) {
// We found our device
// Strip off the trailing : from the device
device[strlen(device)-1] = '\0';
if (sscanf(device,"mtd%d", &deviceId) == 1) {
sprintf(device, "/dev/block/mtdblock%d", deviceId);
Primary_Block_Device = device;
fclose(fp);
return true;
}
}
}
fclose(fp);