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twrpTar.cpp
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twrpTar.cpp
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/*
Copyright 2012 bigbiff/Dees_Troy 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/>.
*/
extern "C" {
#include "libtar/libtar.h"
}
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <fstream>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
#include <dirent.h>
#include <sys/mman.h>
#include "twrpTar.hpp"
#include "common.h"
#include "data.hpp"
#include "variables.h"
#include "twrp-functions.hpp"
using namespace std;
void twrpTar::setfn(string fn) {
tarfn = fn;
}
void twrpTar::setdir(string dir) {
tardir = dir;
}
int twrpTar::createTarGZThread() {
pthread_t thread;
ThreadPtr tarptr = &twrpTar::createTGZ;
PThreadPtr p = *(PThreadPtr*)&tarptr;
pthread_create(&thread, NULL, p, this);
if(pthread_join(thread, NULL)) {
return -1;
}
return 0;
}
int twrpTar::createTarThread() {
pthread_t thread;
ThreadPtr tarptr = &twrpTar::create;
PThreadPtr p = *(PThreadPtr*)&tarptr;
pthread_create(&thread, NULL, p, this);
if(pthread_join(thread, NULL)) {
return -1;
}
return 0;
}
int twrpTar::extractTarThread() {
pthread_t thread;
ThreadPtr tarptr = &twrpTar::extract;
PThreadPtr p = *(PThreadPtr*)&tarptr;
pthread_create(&thread, NULL, p, this);
if(pthread_join(thread, NULL)) {
return -1;
}
return 0;
}
int twrpTar::splitArchiveThread() {
pthread_t thread;
ThreadPtr tarptr = &twrpTar::Split_Archive;
PThreadPtr p = *(PThreadPtr*)&tarptr;
pthread_create(&thread, NULL, p, this);
if(pthread_join(thread, NULL)) {
return -1;
}
return 0;
}
int twrpTar::Generate_Multiple_Archives(string Path) {
DIR* d;
struct dirent* de;
struct stat st;
string FileName;
char actual_filename[255];
if (has_data_media == 1 && Path.size() >= 11 && strncmp(Path.c_str(), "/data/media", 11) == 0)
return 0; // Skip /data/media
LOGI("Path: '%s', archive filename: '%s'\n", Path.c_str(), tarfn.c_str());
d = opendir(Path.c_str());
if (d == NULL)
{
LOGE("error opening '%s' -- error: %s\n", Path.c_str(), strerror(errno));
closedir(d);
return -1;
}
while ((de = readdir(d)) != NULL)
{
FileName = Path + "/";
FileName += de->d_name;
if (has_data_media == 1 && FileName.size() >= 11 && strncmp(FileName.c_str(), "/data/media", 11) == 0)
continue; // Skip /data/media
if (de->d_type == DT_DIR && strcmp(de->d_name, ".") != 0 && strcmp(de->d_name, "..") != 0)
{
unsigned long long folder_size = TWFunc::Get_Folder_Size(FileName, false);
tardir = FileName;
if (Archive_Current_Size + folder_size > MAX_ARCHIVE_SIZE) {
LOGI("Calling Generate_Multiple_Archives\n");
if (Generate_Multiple_Archives(FileName) < 0)
return -1;
} else {
//FileName += "/";
LOGI("Adding folder '%s'\n", FileName.c_str());
tardir = FileName;
if (tarDirs(true) < 0)
return -1;
Archive_Current_Size += folder_size;
}
}
else if (de->d_type == DT_REG || de->d_type == DT_LNK)
{
stat(FileName.c_str(), &st);
if (Archive_Current_Size != 0 && Archive_Current_Size + st.st_size > MAX_ARCHIVE_SIZE) {
LOGI("Closing tar '%s', ", tarfn.c_str());
closeTar(false);
if (TWFunc::Get_File_Size(tarfn) == 0) {
LOGE("Backup file size for '%s' is 0 bytes.\n", tarfn.c_str());
return -1;
}
Archive_File_Count++;
if (Archive_File_Count > 999) {
LOGE("Archive count is too large!\n");
return -1;
}
string temp = basefn + "%03i";
sprintf(actual_filename, temp.c_str(), Archive_File_Count);
tarfn = actual_filename;
Archive_Current_Size = 0;
LOGI("Creating tar '%s'\n", tarfn.c_str());
ui_print("Creating archive %i...\n", Archive_File_Count + 1);
if (createTar() != 0)
return -1;
}
LOGI("Adding file: '%s'... ", FileName.c_str());
if (addFile(FileName, true) < 0)
return -1;
Archive_Current_Size += st.st_size;
LOGI("added successfully, archive size: %llu\n", Archive_Current_Size);
if (st.st_size > 2147483648LL)
LOGE("There is a file that is larger than 2GB in the file system\n'%s'\nThis file may not restore properly\n", FileName.c_str());
}
}
closedir(d);
return 0;
}
int twrpTar::Split_Archive()
{
string temp = tarfn + "%03i";
char actual_filename[255];
basefn = tarfn;
Archive_File_Count = 0;
Archive_Current_Size = 0;
sprintf(actual_filename, temp.c_str(), Archive_File_Count);
tarfn = actual_filename;
createTar();
DataManager::GetValue(TW_HAS_DATA_MEDIA, has_data_media);
ui_print("Creating archive 1...\n");
if (Generate_Multiple_Archives(tardir) < 0) {
LOGE("Error generating file list\n");
return -1;
}
closeTar(false);
LOGI("Done, created %i archives.\n", (Archive_File_Count++));
return (Archive_File_Count);
}
int twrpTar::extractTar() {
char* charRootDir = (char*) tardir.c_str();
bool gzip = false;
if (openTar(gzip) == -1)
return -1;
if (tar_extract_all(t, charRootDir) != 0) {
LOGE("Unable to extract tar archive '%s'\n", tarfn.c_str());
return -1;
}
if (tar_close(t) != 0) {
LOGE("Unable to close tar file\n");
return -1;
}
return 0;
}
int twrpTar::extract() {
int len = 3;
char header[len];
string::size_type i = 0;
int firstbyte = 0;
int secondbyte = 0;
int ret;
ifstream f;
f.open(tarfn.c_str(), ios::in | ios::binary);
f.get(header, len);
firstbyte = header[i] & 0xff;
secondbyte = header[++i] & 0xff;
f.close();
if (firstbyte == 0x1f && secondbyte == 0x8b) {
//if you return the extractTGZ function directly, stack crashes happen
LOGI("Extracting gzipped tar\n");
ret = extractTGZ();
return ret;
}
else {
LOGI("Extracting uncompressed tar\n");
return extractTar();
}
}
int twrpTar::tarDirs(bool include_root) {
DIR* d;
string mainfolder = tardir + "/", subfolder;
char buf[1024];
char* charTarFile = (char*) tarfn.c_str();
d = opendir(tardir.c_str());
if (d != NULL) {
struct dirent* de;
while ((de = readdir(d)) != NULL) {
LOGI("adding %s\n", de->d_name);
#ifdef RECOVERY_SDCARD_ON_DATA
if ((tardir == "/data" || tardir == "/data/") && strcmp(de->d_name, "media") == 0) continue;
#endif
if (strcmp(de->d_name, ".") == 0 || strcmp(de->d_name, "..") == 0) continue;
subfolder = mainfolder;
subfolder += de->d_name;
strcpy(buf, subfolder.c_str());
if (de->d_type == DT_DIR) {
if (include_root) {
if (tar_append_tree(t, buf, NULL) != 0) {
LOGE("Error appending '%s' to tar archive '%s'\n", buf, charTarFile);
return -1;
}
} else {
string temp = Strip_Root_Dir(buf);
char* charTarPath = (char*) temp.c_str();
if (tar_append_tree(t, buf, charTarPath) != 0) {
LOGE("Error appending '%s' to tar archive '%s'\n", buf, charTarFile);
return -1;
}
}
} else if (tardir != "/" && (de->d_type == DT_REG || de->d_type == DT_LNK)) {
if (addFile(buf, include_root) != 0)
return -1;
}
fflush(NULL);
}
closedir(d);
}
return 0;
}
int twrpTar::createTGZ() {
bool gzip = true;
if (createTar() == -1)
return -1;
if (tarDirs(false) == -1)
return -1;
if (closeTar(gzip) == -1)
return -1;
return 0;
}
int twrpTar::create() {
bool gzip = false;
if (createTar() == -1)
return -1;
if (tarDirs(false) == -1)
return -1;
if (closeTar(gzip) == -1)
return -1;
return 0;
}
int twrpTar::addFilesToExistingTar(vector <string> files, string fn) {
char* charTarFile = (char*) fn.c_str();
if (tar_open(&t, charTarFile, NULL, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) == -1)
return -1;
removeEOT(charTarFile);
if (tar_open(&t, charTarFile, NULL, O_WRONLY | O_APPEND | O_LARGEFILE, 0644, TAR_GNU) == -1)
return -1;
for (unsigned int i = 0; i < files.size(); ++i) {
char* file = (char*) files.at(i).c_str();
if (tar_append_file(t, file, file) == -1)
return -1;
}
if (tar_append_eof(t) == -1)
return -1;
if (tar_close(t) == -1)
return -1;
return 0;
}
int twrpTar::createTar() {
char* charTarFile = (char*) tarfn.c_str();
char* charRootDir = (char*) tardir.c_str();
int use_compression = 0;
DataManager::GetValue(TW_USE_COMPRESSION_VAR, use_compression);
if (use_compression) {
string cmd = "pigz - > '" + tarfn + "'";
p = popen(cmd.c_str(), "w");
fd = fileno(p);
if (!p) return -1;
if(tar_fdopen(&t, fd, charRootDir, NULL, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) != 0) {
pclose(p);
return -1;
}
}
else {
if (tar_open(&t, charTarFile, NULL, O_WRONLY | O_CREAT | O_LARGEFILE, 0644, TAR_GNU) == -1)
return -1;
}
return 0;
}
int twrpTar::openTar(bool gzip) {
char* charRootDir = (char*) tardir.c_str();
char* charTarFile = (char*) tarfn.c_str();
if (gzip) {
LOGI("Opening as a gzip\n");
string cmd = "pigz -d -c '" + tarfn + "'";
FILE* pipe = popen(cmd.c_str(), "r");
int fd = fileno(pipe);
if (!pipe) return -1;
if(tar_fdopen(&t, fd, charRootDir, NULL, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) != 0) {
LOGI("tar_fdopen returned error\n");
pclose(pipe);
return -1;
}
}
else {
if (tar_open(&t, charTarFile, NULL, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) != 0) {
LOGE("Unable to open tar archive '%s'\n", charTarFile);
return -1;
}
}
return 0;
}
string twrpTar::Strip_Root_Dir(string Path) {
string temp;
size_t slash;
if (Path.substr(0, 1) == "/")
temp = Path.substr(1, Path.size() - 1);
else
temp = Path;
slash = temp.find("/");
if (slash == string::npos)
return temp;
else {
string stripped;
stripped = temp.substr(slash, temp.size() - slash);
return stripped;
}
return temp;
}
int twrpTar::addFile(string fn, bool include_root) {
char* charTarFile = (char*) fn.c_str();
if (include_root) {
if (tar_append_file(t, charTarFile, NULL) == -1)
return -1;
} else {
string temp = Strip_Root_Dir(fn);
char* charTarPath = (char*) temp.c_str();
if (tar_append_file(t, charTarFile, charTarPath) == -1)
return -1;
}
return 0;
}
int twrpTar::closeTar(bool gzip) {
int use_compression;
DataManager::GetValue(TW_USE_COMPRESSION_VAR, use_compression);
if (tar_append_eof(t) != 0) {
LOGE("tar_append_eof(): %s\n", strerror(errno));
tar_close(t);
return -1;
}
if (tar_close(t) != 0) {
LOGE("Unable to close tar archive: '%s'\n", tarfn.c_str());
return -1;
}
if (use_compression || gzip) {
LOGI("Closing popen and fd\n");
pclose(p);
close(fd);
}
return 0;
}
int twrpTar::removeEOT(string tarFile) {
char* charTarFile = (char*) tarFile.c_str();
off_t tarFileEnd;
while (th_read(t) == 0) {
if (TH_ISREG(t))
tar_skip_regfile(t);
tarFileEnd = lseek(t->fd, 0, SEEK_CUR);
}
if (tar_close(t) == -1)
return -1;
if (truncate(charTarFile, tarFileEnd) == -1)
return -1;
return 0;
}
int twrpTar::compress(string fn) {
string cmd = "pigz " + fn;
p = popen(cmd.c_str(), "r");
if (!p) return -1;
char buffer[128];
string result = "";
while(!feof(p)) {
if(fgets(buffer, 128, p) != NULL)
result += buffer;
}
pclose(p);
return 0;
}
int twrpTar::extractTGZ() {
string splatrootdir(tardir);
bool gzip = true;
char* splatCharRootDir = (char*) splatrootdir.c_str();
if (openTar(gzip) == -1)
return -1;
int ret = tar_extract_all(t, splatCharRootDir);
if (tar_close(t) != 0) {
LOGE("Unable to close tar file\n");
return -1;
}
return 0;
}