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gerrit.twrp.me / android_bootable_recovery / 374cd713d44dc62878f34f36d36948689f53e85a / . / twrpTar.cpp
blob: ee9d9dcb784d6ecaea6cbd3aff0fedfef726ae62 [file] [log] [blame]
/*
Copyright 2013 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 "twrpTar.h"
#include "tarWrite.h"
}
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include <dirent.h>
#include <libgen.h>
#include <sys/mman.h>
#include "twrpTar.hpp"
#include "twcommon.h"
#include "variables.h"
#include "twrp-functions.hpp"
using namespace std;
twrpTar::twrpTar(void) {
use_encryption = 0;
userdata_encryption = 0;
use_compression = 0;
split_archives = 0;
has_data_media = 0;
pigz_pid = 0;
oaes_pid = 0;
Total_Backup_Size = 0;
include_root_dir = true;
}
twrpTar::~twrpTar(void) {
// Do nothing
}
void twrpTar::setfn(string fn) {
tarfn = fn;
}
void twrpTar::setdir(string dir) {
tardir = dir;
}
void twrpTar::setexcl(string exclude) {
tarexclude.push_back(exclude);
}
void twrpTar::setsize(unsigned long long backup_size) {
Total_Backup_Size = backup_size;
}
void twrpTar::setpassword(string pass) {
password = pass;
}
int twrpTar::createTarFork() {
int status = 0;
pid_t pid, rc_pid;
if ((pid = fork()) == -1) {
LOGINFO("create tar failed to fork.\n");
return -1;
}
if (pid == 0) {
// Child process
if (use_encryption || userdata_encryption) {
LOGINFO("Using encryption\n");
DIR* d;
struct dirent* de;
unsigned long long regular_size = 0, encrypt_size = 0, target_size = 0, core_count = 1;
unsigned enc_thread_id = 1, regular_thread_id = 0, i, start_thread_id = 1;
int item_len, ret, thread_error = 0;
std::vector<TarListStruct> RegularList;
std::vector<TarListStruct> EncryptList;
string FileName;
struct TarListStruct TarItem;
twrpTar reg, enc[9];
struct stat st;
pthread_t enc_thread[9];
pthread_attr_t tattr;
void *thread_return;
core_count = sysconf(_SC_NPROCESSORS_CONF);
if (core_count > 8)
core_count = 8;
LOGINFO(" Core Count : %llu\n", core_count);
Archive_Current_Size = 0;
d = opendir(tardir.c_str());
if (d == NULL) {
LOGERR("error opening '%s'\n", tardir.c_str());
_exit(-1);
}
// Figure out the size of all data to be encrypted and create a list of unencrypted files
while ((de = readdir(d)) != NULL) {
FileName = tardir + "/";
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_BLK || de->d_type == DT_CHR)
continue;
bool skip_dir = false;
string dir(de->d_name);
skip_dir = du.check_skip_dirs(dir);
if (de->d_type == DT_DIR && !skip_dir) {
item_len = strlen(de->d_name);
if (userdata_encryption && ((item_len >= 3 && strncmp(de->d_name, "app", 3) == 0) || (item_len >= 6 && strncmp(de->d_name, "dalvik", 6) == 0))) {
if (Generate_TarList(FileName, &RegularList, &target_size, &regular_thread_id) < 0) {
LOGERR("Error in Generate_TarList with regular list!\n");
closedir(d);
_exit(-1);
}
regular_size += du.Get_Folder_Size(FileName);
} else {
encrypt_size += du.Get_Folder_Size(FileName);
}
} else if (de->d_type == DT_REG) {
stat(FileName.c_str(), &st);
encrypt_size += (unsigned long long)(st.st_size);
}
}
closedir(d);
target_size = encrypt_size / core_count;
target_size++;
LOGINFO(" Unencrypted size: %llu\n", regular_size);
LOGINFO(" Encrypted size : %llu\n", encrypt_size);
LOGINFO(" Target size : %llu\n", target_size);
if (!userdata_encryption) {
enc_thread_id = 0;
start_thread_id = 0;
core_count--;
}
Archive_Current_Size = 0;
d = opendir(tardir.c_str());
if (d == NULL) {
LOGERR("error opening '%s'\n", tardir.c_str());
_exit(-1);
}
// Divide up the encrypted file list for threading
while ((de = readdir(d)) != NULL) {
FileName = tardir + "/";
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_BLK || de->d_type == DT_CHR)
continue;
bool skip_dir = false;
string dir(de->d_name);
skip_dir = du.check_skip_dirs(dir);
if (de->d_type == DT_DIR && !skip_dir) {
item_len = strlen(de->d_name);
if (userdata_encryption && ((item_len >= 3 && strncmp(de->d_name, "app", 3) == 0) || (item_len >= 6 && strncmp(de->d_name, "dalvik", 6) == 0))) {
// Do nothing, we added these to RegularList earlier
} else {
FileName = tardir + "/";
FileName += de->d_name;
if (Generate_TarList(FileName, &EncryptList, &target_size, &enc_thread_id) < 0) {
LOGERR("Error in Generate_TarList with encrypted list!\n");
closedir(d);
_exit(-1);
}
}
} else if (de->d_type == DT_REG || de->d_type == DT_LNK) {
stat(FileName.c_str(), &st);
if (de->d_type == DT_REG)
Archive_Current_Size += (unsigned long long)(st.st_size);
TarItem.fn = FileName;
TarItem.thread_id = enc_thread_id;
EncryptList.push_back(TarItem);
}
}
closedir(d);
if (enc_thread_id != core_count) {
LOGERR("Error dividing up threads for encryption, %i threads for %i cores!\n", enc_thread_id, core_count);
if (enc_thread_id > core_count)
_exit(-1);
else
LOGERR("Continuining anyway.");
}
if (userdata_encryption) {
// Create a backup of unencrypted data
reg.setfn(tarfn);
reg.ItemList = &RegularList;
reg.thread_id = 0;
reg.use_encryption = 0;
reg.use_compression = use_compression;
reg.split_archives = 1;
LOGINFO("Creating unencrypted backup...\n");
if (createList((void*)&reg) != 0) {
LOGERR("Error creating unencrypted backup.\n");
_exit(-1);
}
}
if (pthread_attr_init(&tattr)) {
LOGERR("Unable to pthread_attr_init\n");
_exit(-1);
}
if (pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_JOINABLE)) {
LOGERR("Error setting pthread_attr_setdetachstate\n");
_exit(-1);
}
if (pthread_attr_setscope(&tattr, PTHREAD_SCOPE_SYSTEM)) {
LOGERR("Error setting pthread_attr_setscope\n");
_exit(-1);
}
/*if (pthread_attr_setstacksize(&tattr, 524288)) {
LOGERR("Error setting pthread_attr_setstacksize\n");
_exit(-1);
}*/
// Create threads for the divided up encryption lists
for (i = start_thread_id; i <= core_count; i++) {
enc[i].setdir(tardir);
enc[i].setfn(tarfn);
enc[i].ItemList = &EncryptList;
enc[i].thread_id = i;
enc[i].use_encryption = use_encryption;
enc[i].use_compression = use_compression;
enc[i].split_archives = 1;
LOGINFO("Start encryption thread %i\n", i);
ret = pthread_create(&enc_thread[i], &tattr, createList, (void*)&enc[i]);
if (ret) {
LOGINFO("Unable to create %i thread for encryption! %i\nContinuing in same thread (backup will be slower).", i, ret);
if (createList((void*)&enc[i]) != 0) {
LOGERR("Error creating encrypted backup %i.\n", i);
_exit(-1);
} else {
enc[i].thread_id = i + 1;
}
}
usleep(100000); // Need a short delay before starting the next thread or the threads will never finish for some reason.
}
if (pthread_attr_destroy(&tattr)) {
LOGERR("Failed to pthread_attr_destroy\n");
}
for (i = start_thread_id; i <= core_count; i++) {
if (enc[i].thread_id == i) {
if (pthread_join(enc_thread[i], &thread_return)) {
LOGERR("Error joining thread %i\n", i);
_exit(-1);
} else {
LOGINFO("Joined thread %i.\n", i);
ret = (int)thread_return;
if (ret != 0) {
thread_error = 1;
LOGERR("Thread %i returned an error %i.\n", i, ret);
_exit(-1);
}
}
} else {
LOGINFO("Skipping joining thread %i because of pthread failure.\n", i);
}
}
if (thread_error) {
LOGERR("Error returned by one or more threads.\n");
_exit(-1);
}
LOGINFO("Finished encrypted backup.\n");
_exit(0);
} else {
std::vector<TarListStruct> FileList;
unsigned thread_id = 0;
unsigned long long target_size = 0;
twrpTar reg;
// Generate list of files to back up
if (Generate_TarList(tardir, &FileList, &target_size, &thread_id) < 0) {
LOGERR("Error in Generate_TarList!\n");
_exit(-1);
}
// Create a backup
reg.setfn(tarfn);
reg.ItemList = &FileList;
reg.thread_id = 0;
reg.use_encryption = 0;
reg.use_compression = use_compression;
reg.setsize(Total_Backup_Size);
if (Total_Backup_Size > MAX_ARCHIVE_SIZE) {
gui_print("Breaking backup file into multiple archives...\n");
reg.split_archives = 1;
} else {
reg.split_archives = 0;
}
LOGINFO("Creating backup...\n");
if (createList((void*)&reg) != 0) {
LOGERR("Error creating backup.\n");
_exit(-1);
}
_exit(0);
}
} else {
if (TWFunc::Wait_For_Child(pid, &status, "createTarFork()") != 0)
return -1;
}
return 0;
}
int twrpTar::extractTarFork() {
int status = 0;
pid_t pid, rc_pid;
pid = fork();
if (pid >= 0) // fork was successful
{
if (pid == 0) // child process
{
if (TWFunc::Path_Exists(tarfn)) {
LOGINFO("Single archive\n");
if (extract() != 0)
_exit(-1);
else
_exit(0);
} else {
LOGINFO("Multiple archives\n");
string temp;
char actual_filename[255];
twrpTar tars[9];
pthread_t tar_thread[9];
pthread_attr_t tattr;
int thread_count = 0, i, start_thread_id = 1, ret, thread_error = 0;
void *thread_return;
basefn = tarfn;
temp = basefn + "%i%02i";
tarfn += "000";
if (!TWFunc::Path_Exists(tarfn)) {
LOGERR("Unable to locate '%s' or '%s'\n", basefn.c_str(), tarfn.c_str());
_exit(-1);
}
if (TWFunc::Get_File_Type(tarfn) != 2) {
LOGINFO("First tar file '%s' not encrypted\n", tarfn.c_str());
tars[0].basefn = basefn;
tars[0].thread_id = 0;
if (extractMulti((void*)&tars[0]) != 0) {
LOGERR("Error extracting split archive.\n");
_exit(-1);
}
} else {
start_thread_id = 0;
}
// Start threading encrypted restores
if (pthread_attr_init(&tattr)) {
LOGERR("Unable to pthread_attr_init\n");
_exit(-1);
}
if (pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_JOINABLE)) {
LOGERR("Error setting pthread_attr_setdetachstate\n");
_exit(-1);
}
if (pthread_attr_setscope(&tattr, PTHREAD_SCOPE_SYSTEM)) {
LOGERR("Error setting pthread_attr_setscope\n");
_exit(-1);
}
/*if (pthread_attr_setstacksize(&tattr, 524288)) {
LOGERR("Error setting pthread_attr_setstacksize\n");
_exit(-1);
}*/
for (i = start_thread_id; i < 9; i++) {
sprintf(actual_filename, temp.c_str(), i, 0);
if (TWFunc::Path_Exists(actual_filename)) {
thread_count++;
tars[i].basefn = basefn;
tars[i].thread_id = i;
LOGINFO("Creating extract thread ID %i\n", i);
ret = pthread_create(&tar_thread[i], &tattr, extractMulti, (void*)&tars[i]);
if (ret) {
LOGINFO("Unable to create %i thread for extraction! %i\nContinuing in same thread (restore will be slower).", i, ret);
if (extractMulti((void*)&tars[i]) != 0) {
LOGERR("Error extracting backup in thread %i.\n", i);
_exit(-1);
} else {
tars[i].thread_id = i + 1;
}
}
usleep(100000); // Need a short delay before starting the next thread or the threads will never finish for some reason.
} else {
break;
}
}
for (i = start_thread_id; i < thread_count + start_thread_id; i++) {
if (tars[i].thread_id == i) {
if (pthread_join(tar_thread[i], &thread_return)) {
LOGERR("Error joining thread %i\n", i);
_exit(-1);
} else {
LOGINFO("Joined thread %i.\n", i);
ret = (int)thread_return;
if (ret != 0) {
thread_error = 1;
LOGERR("Thread %i returned an error %i.\n", i, ret);
_exit(-1);
}
}
} else {
LOGINFO("Skipping joining thread %i because of pthread failure.\n", i);
}
}
if (thread_error) {
LOGERR("Error returned by one or more threads.\n");
_exit(-1);
}
LOGINFO("Finished encrypted backup.\n");
_exit(0);
}
}
else // parent process
{
if (TWFunc::Wait_For_Child(pid, &status, "extractTarFork()") != 0)
return -1;
}
}
else // fork has failed
{
LOGINFO("extract tar failed to fork.\n");
return -1;
}
return 0;
}
int twrpTar::Generate_TarList(string Path, std::vector<TarListStruct> *TarList, unsigned long long *Target_Size, unsigned *thread_id) {
DIR* d;
struct dirent* de;
struct stat st;
string FileName;
struct TarListStruct TarItem;
string::size_type i;
bool skip;
if (has_data_media == 1 && Path.size() >= 11 && strncmp(Path.c_str(), "/data/media", 11) == 0)
return 0; // Skip /data/media
d = opendir(Path.c_str());
if (d == NULL) {
LOGERR("Error opening '%s' -- error: %s\n", Path.c_str(), strerror(errno));
closedir(d);
return -1;
}
while ((de = readdir(d)) != NULL) {
// Skip excluded stuff
FileName = Path + "/";
FileName += de->d_name;
if (tarexclude.size() > 0) {
skip = false;
for (i = 0; i < tarexclude.size(); i++) {
if (FileName == tarexclude[i]) {
LOGINFO("Excluding %s\n", FileName.c_str());
break;
}
}
if (skip)
continue;
}
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_BLK || de->d_type == DT_CHR)
continue;
TarItem.fn = FileName;
TarItem.thread_id = *thread_id;
bool skip_dir = false;
string dir(de->d_name);
skip_dir = du.check_skip_dirs(dir);
if (de->d_type == DT_DIR && !skip_dir) {
TarList->push_back(TarItem);
if (Generate_TarList(FileName, TarList, Target_Size, thread_id) < 0)
return -1;
} else if (de->d_type == DT_REG || de->d_type == DT_LNK) {
stat(FileName.c_str(), &st);
TarList->push_back(TarItem);
if (de->d_type == DT_REG)
Archive_Current_Size += st.st_size;
if (Archive_Current_Size != 0 && *Target_Size != 0 && Archive_Current_Size > *Target_Size) {
*thread_id = *thread_id + 1;
Archive_Current_Size = 0;
}
}
}
closedir(d);
return 0;
}
int twrpTar::extractTar() {
char* charRootDir = (char*) tardir.c_str();
if (openTar() == -1)
return -1;
if (tar_extract_all(t, charRootDir) != 0) {
LOGERR("Unable to extract tar archive '%s'\n", tarfn.c_str());
return -1;
}
if (tar_close(t) != 0) {
LOGERR("Unable to close tar file\n");
return -1;
}
return 0;
}
int twrpTar::extract() {
Archive_Current_Type = TWFunc::Get_File_Type(tarfn);
if (Archive_Current_Type == 1) {
//if you return the extractTGZ function directly, stack crashes happen
LOGINFO("Extracting gzipped tar\n");
int ret = extractTar();
return ret;
} else if (Archive_Current_Type == 2) {
int ret = TWFunc::Try_Decrypting_File(tarfn, password);
if (ret < 1) {
LOGERR("Failed to decrypt tar file '%s'\n", tarfn.c_str());
return -1;
}
if (ret == 1) {
LOGERR("Decrypted file is not in tar format.\n");
return -1;
}
if (ret == 3) {
LOGINFO("Extracting encrypted and compressed tar.\n");
Archive_Current_Type = 3;
} else
LOGINFO("Extracting encrypted tar.\n");
return extractTar();
} else {
LOGINFO("Extracting uncompressed tar\n");
return extractTar();
}
}
int twrpTar::tarList(std::vector<TarListStruct> *TarList, unsigned thread_id) {
struct stat st;
char buf[PATH_MAX];
int list_size = TarList->size(), i = 0, archive_count = 0;
string temp;
char actual_filename[PATH_MAX];
char *ptr;
if (split_archives) {
basefn = tarfn;
temp = basefn + "%i%02i";
sprintf(actual_filename, temp.c_str(), thread_id, archive_count);
tarfn = actual_filename;
include_root_dir = true;
} else {
include_root_dir = false;
}
LOGINFO("Creating tar file '%s'\n", tarfn.c_str());
if (createTar() != 0) {
LOGERR("Error creating tar '%s' for thread %i\n", tarfn.c_str(), thread_id);
return -2;
}
Archive_Current_Size = 0;
while (i < list_size) {
if (TarList->at(i).thread_id == thread_id) {
strcpy(buf, TarList->at(i).fn.c_str());
stat(buf, &st);
if (st.st_mode & S_IFREG) { // item is a regular file
if (Archive_Current_Size + (unsigned long long)(st.st_size) > MAX_ARCHIVE_SIZE) {
if (closeTar() != 0) {
LOGERR("Error closing '%s' on thread %i\n", tarfn.c_str(), thread_id);
return -3;
}
archive_count++;
gui_print("Splitting thread ID %i into archive %i\n", thread_id, archive_count + 1);
if (archive_count > 99) {
LOGERR("Too many archives for thread %i\n", thread_id);
return -4;
}
sprintf(actual_filename, temp.c_str(), thread_id, archive_count);
tarfn = actual_filename;
if (createTar() != 0) {
LOGERR("Error creating tar '%s' for thread %i\n", tarfn.c_str(), thread_id);
return -2;
}
Archive_Current_Size = 0;
}
Archive_Current_Size += (unsigned long long)(st.st_size);
}
LOGINFO("addFile '%s' including root: %i\n", buf, include_root_dir);
if (addFile(buf, include_root_dir) != 0) {
LOGERR("Error adding file '%s' to '%s'\n", buf, tarfn.c_str());
return -1;
}
}
i++;
}
if (closeTar() != 0) {
LOGERR("Error closing '%s' on thread %i\n", tarfn.c_str(), thread_id);
return -3;
}
LOGINFO("Thread id %i tarList done, %i archives.\n", thread_id, archive_count, i, list_size);
return 0;
}
void* twrpTar::createList(void *cookie) {
twrpTar* threadTar = (twrpTar*) cookie;
if (threadTar->tarList(threadTar->ItemList, threadTar->thread_id) == -1) {
LOGINFO("ERROR tarList for thread ID %i\n", threadTar->thread_id);
return (void*)-2;
}
LOGINFO("Thread ID %i finished successfully.\n", threadTar->thread_id);
return (void*)0;
}
void* twrpTar::extractMulti(void *cookie) {
twrpTar* threadTar = (twrpTar*) cookie;
int archive_count = 0;
string temp = threadTar->basefn + "%i%02i";
char actual_filename[255];
sprintf(actual_filename, temp.c_str(), threadTar->thread_id, archive_count);
while (TWFunc::Path_Exists(actual_filename)) {
threadTar->tarfn = actual_filename;
if (threadTar->extract() != 0) {
LOGINFO("Error extracting '%s' in thread ID %i\n", actual_filename, threadTar->thread_id);
return (void*)-2;
}
archive_count++;
if (archive_count > 99)
break;
sprintf(actual_filename, temp.c_str(), threadTar->thread_id, archive_count);
}
LOGINFO("Thread ID %i finished successfully.\n", threadTar->thread_id);
return (void*)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, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) == -1)
return -1;
removeEOT(charTarFile);
if (tar_open(&t, charTarFile, NULL, O_WRONLY | O_APPEND | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) == -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();
static tartype_t type = { open, close, read, write_tar };
if (use_encryption && use_compression) {
// Compressed and encrypted
Archive_Current_Type = 3;
LOGINFO("Using encryption and compression...\n");
int i, pipes[4];
if (pipe(pipes) < 0) {
LOGERR("Error creating first pipe\n");
return -1;
}
if (pipe(pipes + 2) < 0) {
LOGERR("Error creating second pipe\n");
return -1;
}
pigz_pid = fork();
if (pigz_pid < 0) {
LOGERR("pigz fork() failed\n");
for (i = 0; i < 4; i++)
close(pipes[i]); // close all
return -1;
} else if (pigz_pid == 0) {
// pigz Child
close(pipes[1]);
close(pipes[2]);
close(0);
dup2(pipes[0], 0);
close(1);
dup2(pipes[3], 1);
if (execlp("pigz", "pigz", "-", NULL) < 0) {
LOGERR("execlp pigz ERROR!\n");
close(pipes[0]);
close(pipes[3]);
_exit(-1);
}
} else {
// Parent
oaes_pid = fork();
if (oaes_pid < 0) {
LOGERR("openaes fork() failed\n");
for (i = 0; i < 4; i++)
close(pipes[i]); // close all
return -1;
} else if (oaes_pid == 0) {
// openaes Child
int output_fd = open(tarfn.c_str(), O_WRONLY | O_CREAT | O_EXCL | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
if (output_fd < 0) {
LOGERR("Failed to open '%s'\n", tarfn.c_str());
for (i = 0; i < 4; i++)
close(pipes[i]); // close all
return -1;
}
close(pipes[0]);
close(pipes[1]);
close(pipes[3]);
close(0);
dup2(pipes[2], 0);
close(1);
dup2(output_fd, 1);
if (execlp("openaes", "openaes", "enc", "--key", password.c_str(), NULL) < 0) {
LOGERR("execlp openaes ERROR!\n");
close(pipes[2]);
close(output_fd);
_exit(-1);
}
} else {
// Parent
close(pipes[0]);
close(pipes[2]);
close(pipes[3]);
fd = pipes[1];
if(tar_fdopen(&t, fd, charRootDir, NULL, O_WRONLY | O_CREAT | O_EXCL | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) != 0) {
close(fd);
LOGERR("tar_fdopen failed\n");
return -1;
}
return 0;
}
}
} else if (use_compression) {
// Compressed
Archive_Current_Type = 1;
LOGINFO("Using compression...\n");
int pigzfd[2];
if (pipe(pigzfd) < 0) {
LOGERR("Error creating pipe\n");
return -1;
}
pigz_pid = fork();
if (pigz_pid < 0) {
LOGERR("fork() failed\n");
close(pigzfd[0]);
close(pigzfd[1]);
return -1;
} else if (pigz_pid == 0) {
// Child
close(pigzfd[1]); // close unused output pipe
int output_fd = open(tarfn.c_str(), O_WRONLY | O_CREAT | O_EXCL | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
if (output_fd < 0) {
LOGERR("Failed to open '%s'\n", tarfn.c_str());
close(pigzfd[0]);
_exit(-1);
}
dup2(pigzfd[0], 0); // remap stdin
dup2(output_fd, 1); // remap stdout to output file
if (execlp("pigz", "pigz", "-", NULL) < 0) {
LOGERR("execlp pigz ERROR!\n");
close(output_fd);
close(pigzfd[0]);
_exit(-1);
}
} else {
// Parent
close(pigzfd[0]); // close parent input
fd = pigzfd[1]; // copy parent output
if(tar_fdopen(&t, fd, charRootDir, NULL, O_WRONLY | O_CREAT | O_EXCL | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) != 0) {
close(fd);
LOGERR("tar_fdopen failed\n");
return -1;
}
}
} else if (use_encryption) {
// Encrypted
Archive_Current_Type = 2;
LOGINFO("Using encryption...\n");
int oaesfd[2];
pipe(oaesfd);
oaes_pid = fork();
if (oaes_pid < 0) {
LOGERR("fork() failed\n");
close(oaesfd[0]);
close(oaesfd[1]);
return -1;
} else if (oaes_pid == 0) {
// Child
close(oaesfd[1]); // close unused
int output_fd = open(tarfn.c_str(), O_WRONLY | O_CREAT | O_EXCL | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
if (output_fd < 0) {
LOGERR("Failed to open '%s'\n", tarfn.c_str());
_exit(-1);
}
dup2(oaesfd[0], 0); // remap stdin
dup2(output_fd, 1); // remap stdout to output file
if (execlp("openaes", "openaes", "enc", "--key", password.c_str(), NULL) < 0) {
LOGERR("execlp openaes ERROR!\n");
close(output_fd);
close(oaesfd[0]);
_exit(-1);
}
} else {
// Parent
close(oaesfd[0]); // close parent input
fd = oaesfd[1]; // copy parent output
if(tar_fdopen(&t, fd, charRootDir, NULL, O_WRONLY | O_CREAT | O_EXCL | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) != 0) {
close(fd);
LOGERR("tar_fdopen failed\n");
return -1;
}
return 0;
}
} else {
// Not compressed or encrypted
init_libtar_buffer(0);
if (tar_open(&t, charTarFile, &type, O_WRONLY | O_CREAT | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) == -1) {
LOGERR("tar_open error opening '%s'\n", tarfn.c_str());
return -1;
}
}
return 0;
}
int twrpTar::openTar() {
char* charRootDir = (char*) tardir.c_str();
char* charTarFile = (char*) tarfn.c_str();
string Password;
if (Archive_Current_Type == 3) {
LOGINFO("Opening encrypted and compressed backup...\n");
int i, pipes[4];
if (pipe(pipes) < 0) {
LOGERR("Error creating first pipe\n");
return -1;
}
if (pipe(pipes + 2) < 0) {
LOGERR("Error creating second pipe\n");
return -1;
}
oaes_pid = fork();
if (oaes_pid < 0) {
LOGERR("pigz fork() failed\n");
for (i = 0; i < 4; i++)
close(pipes[i]); // close all
return -1;
} else if (oaes_pid == 0) {
// openaes Child
close(pipes[0]); // Close pipes that are not used by this child
close(pipes[2]);
close(pipes[3]);
int input_fd = open(tarfn.c_str(), O_RDONLY | O_LARGEFILE);
if (input_fd < 0) {
LOGERR("Failed to open '%s'\n", tarfn.c_str());
close(pipes[1]);
_exit(-1);
}
close(0);
dup2(input_fd, 0);
close(1);
dup2(pipes[1], 1);
if (execlp("openaes", "openaes", "dec", "--key", password.c_str(), NULL) < 0) {
LOGERR("execlp openaes ERROR!\n");
close(input_fd);
close(pipes[1]);
_exit(-1);
}
} else {
// Parent
pigz_pid = fork();
if (pigz_pid < 0) {
LOGERR("openaes fork() failed\n");
for (i = 0; i < 4; i++)
close(pipes[i]); // close all
return -1;
} else if (pigz_pid == 0) {
// pigz Child
close(pipes[1]); // Close pipes not used by this child
close(pipes[2]);
close(0);
dup2(pipes[0], 0);
close(1);
dup2(pipes[3], 1);
if (execlp("pigz", "pigz", "-d", "-c", NULL) < 0) {
LOGERR("execlp pigz ERROR!\n");
close(pipes[0]);
close(pipes[3]);
_exit(-1);
}
} else {
// Parent
close(pipes[0]); // Close pipes not used by parent
close(pipes[1]);
close(pipes[3]);
fd = pipes[2];
if(tar_fdopen(&t, fd, charRootDir, NULL, O_RDONLY | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) != 0) {
close(fd);
LOGERR("tar_fdopen failed\n");
return -1;
}
}
}
} else if (Archive_Current_Type == 2) {
LOGINFO("Opening encrypted backup...\n");
int oaesfd[2];
pipe(oaesfd);
oaes_pid = fork();
if (oaes_pid < 0) {
LOGERR("fork() failed\n");
close(oaesfd[0]);
close(oaesfd[1]);
return -1;
} else if (oaes_pid == 0) {
// Child
close(oaesfd[0]); // Close unused pipe
int input_fd = open(tarfn.c_str(), O_RDONLY | O_LARGEFILE);
if (input_fd < 0) {
LOGERR("Failed to open '%s'\n", tarfn.c_str());
close(oaesfd[1]);
_exit(-1);
}
close(0); // close stdin
dup2(oaesfd[1], 1); // remap stdout
dup2(input_fd, 0); // remap input fd to stdin
if (execlp("openaes", "openaes", "dec", "--key", password.c_str(), NULL) < 0) {
LOGERR("execlp openaes ERROR!\n");
close(input_fd);
close(oaesfd[1]);
_exit(-1);
}
} else {
// Parent
close(oaesfd[1]); // close parent output
fd = oaesfd[0]; // copy parent input
if(tar_fdopen(&t, fd, charRootDir, NULL, O_RDONLY | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) != 0) {
close(fd);
LOGERR("tar_fdopen failed\n");
return -1;
}
}
} else if (Archive_Current_Type == 1) {
LOGINFO("Opening as a gzip...\n");
int pigzfd[2];
pipe(pigzfd);
pigz_pid = fork();
if (pigz_pid < 0) {
LOGERR("fork() failed\n");
close(pigzfd[0]);
close(pigzfd[1]);
return -1;
} else if (pigz_pid == 0) {
// Child
close(pigzfd[0]);
int input_fd = open(tarfn.c_str(), O_RDONLY | O_LARGEFILE);
if (input_fd < 0) {
LOGERR("Failed to open '%s'\n", tarfn.c_str());
_exit(-1);
}
dup2(input_fd, 0); // remap input fd to stdin
dup2(pigzfd[1], 1); // remap stdout
if (execlp("pigz", "pigz", "-d", "-c", NULL) < 0) {
close(pigzfd[1]);
close(input_fd);
LOGERR("execlp openaes ERROR!\n");
_exit(-1);
}
} else {
// Parent
close(pigzfd[1]); // close parent output
fd = pigzfd[0]; // copy parent input
if(tar_fdopen(&t, fd, charRootDir, NULL, O_RDONLY | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) != 0) {
close(fd);
LOGERR("tar_fdopen failed\n");
return -1;
}
}
} else if (tar_open(&t, charTarFile, NULL, O_RDONLY | O_LARGEFILE, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, TAR_GNU | TAR_STORE_SELINUX) != 0) {
LOGERR("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() {
flush_libtar_buffer(t->fd);
if (tar_append_eof(t) != 0) {
LOGERR("tar_append_eof(): %s\n", strerror(errno));
tar_close(t);
return -1;
}
if (tar_close(t) != 0) {
LOGERR("Unable to close tar archive: '%s'\n", tarfn.c_str());
return -1;
}
if (Archive_Current_Type > 0) {
close(fd);
int status;
if (pigz_pid > 0 && TWFunc::Wait_For_Child(pigz_pid, &status, "pigz") != 0)
return -1;
if (oaes_pid > 0 && TWFunc::Wait_For_Child(oaes_pid, &status, "openaes") != 0)
return -1;
}
free_libtar_buffer();
if (use_compression && !use_encryption) {
string gzname = tarfn + ".gz";
if (TWFunc::Path_Exists(gzname)) {
rename(gzname.c_str(), tarfn.c_str());
}
}
if (TWFunc::Get_File_Size(tarfn) == 0) {
LOGERR("Backup file size for '%s' is 0 bytes.\n", tarfn.c_str());
return -1;
}
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::entryExists(string entry) {
char* searchstr = (char*)entry.c_str();
int ret;
Archive_Current_Type = TWFunc::Get_File_Type(tarfn);
if (openTar() == -1)
ret = 0;
else
ret = tar_find(t, searchstr);
if (closeTar() != 0)
LOGINFO("Unable to close tar after searching for entry.\n");
return ret;
}
unsigned long long twrpTar::uncompressedSize() {
int type = 0;
unsigned long long total_size = 0;
string Tar, Command, result;
vector<string> split;
Tar = TWFunc::Get_Filename(tarfn);
type = TWFunc::Get_File_Type(tarfn);
if (type == 0)
total_size = TWFunc::Get_File_Size(tarfn);
else {
Command = "pigz -l " + tarfn;
/* if we set Command = "pigz -l " + tarfn + " | sed '1d' | cut -f5 -d' '";
we get the uncompressed size at once. */
TWFunc::Exec_Cmd(Command, result);
if (!result.empty()) {
/* Expected output:
compressed original reduced name
95855838 179403776 -1.3% data.yaffs2.win
^
split[5]
*/
split = TWFunc::split_string(result, ' ', true);
if (split.size() > 4)
total_size = atoi(split[5].c_str());
}
}
LOGINFO("%s's uncompressed size: %llu bytes\n", Tar.c_str(), total_size);
return total_size;
}
extern "C" ssize_t write_tar(int fd, const void *buffer, size_t size) {
return (ssize_t) write_libtar_buffer(fd, buffer, size);
}