Support encrypted backup files
Also includes features merged from:
Update twrpTar by kokotas
Revised function entryExists().
Added function to get archive's uncompressed size.
Added option to exclude item(s) from the archive.
Revised forks()
http://review.teamw.in/#/c/590/
Change-Id: I01fa2c81643161984eff2625247af75990684bd9
diff --git a/twrpTar.cpp b/twrpTar.cpp
index 2dbfd15..bc7f370 100644
--- a/twrpTar.cpp
+++ b/twrpTar.cpp
@@ -32,6 +32,7 @@
#include <iostream>
#include <string>
#include <sstream>
+#include <vector>
#include <dirent.h>
#include <sys/mman.h>
#include "twrpTar.hpp"
@@ -42,6 +43,20 @@
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;
+}
+
+twrpTar::~twrpTar(void) {
+ // Do nothing
+}
+
void twrpTar::setfn(string fn) {
tarfn = fn;
}
@@ -50,139 +65,428 @@
tardir = dir;
}
-int twrpTar::createTarGZFork() {
- int status;
- pid_t pid;
- if ((pid = fork()) == -1) {
- LOGINFO("create tar failed to fork.\n");
- return -1;
- }
- if (pid == 0) {
- if (createTGZ() != 0)
- exit(-1);
- else
- exit(0);
- }
- else {
- if ((pid = wait(&status)) == -1) {
- LOGINFO("Tar creation failed\n");
- return -1;
- }
- else {
- if (WIFSIGNALED(status) != 0) {
- LOGINFO("Child process ended with signal: %d\n", WTERMSIG(status));
- return -1;
- }
- else if (WIFEXITED(status) != 0)
- LOGINFO("Tar creation successful\n");
- else {
- LOGINFO("Tar creation failed\n");
- return -1;
- }
- }
- }
- return 0;
+void twrpTar::setexcl(string exclude) {
+ tarexclude = exclude;
}
int twrpTar::createTarFork() {
- int status;
- pid_t pid;
+ int status = 0;
+ pid_t pid, rc_pid;
if ((pid = fork()) == -1) {
LOGINFO("create tar failed to fork.\n");
return -1;
}
if (pid == 0) {
- if (create() != 0)
- exit(-1);
- else
- exit(0);
- }
- else {
- if ((pid = wait(&status)) == -1) {
- LOGINFO("Tar creation failed\n");
+ // 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;
+ if (de->d_type == DT_DIR && strcmp(de->d_name, ".") != 0 && strcmp(de->d_name, "..") != 0) {
+ 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, ®ular_thread_id) < 0) {
+ LOGERR("Error in Generate_TarList with regular list!\n");
+ closedir(d);
+ _exit(-1);
+ }
+ regular_size += TWFunc::Get_Folder_Size(FileName, false);
+ } else {
+ encrypt_size += TWFunc::Get_Folder_Size(FileName, false);
+ }
+ } 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;
+ if (de->d_type == DT_DIR && strcmp(de->d_name, ".") != 0 && strcmp(de->d_name, "..") != 0) {
+ 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;
+ LOGINFO("Creating unencrypted backup...\n");
+ if (createList((void*)®) != 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;
+ 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 {
+ if (create() != 0)
+ _exit(-1);
+ else
+ _exit(0);
+ }
+ } else {
+ if (TWFunc::Wait_For_Child(pid, &status, "createTarFork()") != 0)
return -1;
- }
- else {
- if (WIFSIGNALED(status) != 0) {
- LOGINFO("Child process ended with signal: %d\n", WTERMSIG(status));
- return -1;
- }
- else if (WEXITSTATUS(status) == 0)
- LOGINFO("Tar creation successful\n");
- else {
- LOGINFO("Tar creation failed\n");
- return -1;
- }
- }
}
return 0;
}
int twrpTar::extractTarFork() {
- int status;
- pid_t pid;
- if ((pid = fork()) == -1) {
+ 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;
}
- if (pid == 0) {
- if (extract() != 0)
- exit(-1);
- else
- exit(0);
- }
- else {
- if ((pid = wait(&status)) == -1) {
- LOGINFO("Tar extraction failed\n");
- return -1;
- }
- else {
- if (WIFSIGNALED(status) != 0) {
- LOGINFO("Child process ended with signal: %d\n", WTERMSIG(status));
- return -1;
- }
- else if (WEXITSTATUS(status) == 0)
- LOGINFO("Tar extraction successful\n");
- else {
- LOGINFO("Tar extraction failed\n");
- return -1;
- }
- }
- }
return 0;
}
int twrpTar::splitArchiveFork() {
- int status;
- pid_t pid;
- if ((pid = fork()) == -1) {
- LOGINFO("create tar failed to fork.\n");
+ int status = 0;
+ pid_t pid, rc_pid;
+
+ pid = fork();
+ if (pid >= 0) // fork was successful
+ {
+ if (pid == 0) // child process
+ {
+ if (Split_Archive() <= 0)
+ _exit(-1);
+ else
+ _exit(0);
+ }
+ else // parent process
+ {
+ if (TWFunc::Wait_For_Child(pid, &status, "splitArchiveFork()") != 0)
+ return -1;
+ }
+ }
+ else // fork has failed
+ {
+ LOGINFO("split archive failed to fork.\n");
return -1;
}
- if (pid == 0) {
- if (Split_Archive() != 0)
- exit(-1);
- else
- exit(0);
+ 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;
}
- else {
- if ((pid = wait(&status)) == -1) {
- LOGINFO("Tar creation failed\n");
- return -1;
- }
- else {
- if (WIFSIGNALED(status) != 0) {
- LOGINFO("Child process ended with signal: %d\n", WTERMSIG(status));
- return -1;
+ while ((de = readdir(d)) != NULL) {
+ // Skip excluded stuff
+ if (split.size() > 0) {
+ skip = false;
+ for (i = 0; i < split.size(); i++) {
+ if (strcmp(de->d_name, split[i].c_str()) == 0) {
+ LOGINFO("excluding %s\n", de->d_name);
+ skip = true;
+ break;
+ }
}
- else if (WIFEXITED(status) != 0)
- LOGINFO("Tar creation successful\n");
- else {
- LOGINFO("Tar creation failed\n");
+ if (skip)
+ continue;
+ }
+ 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_BLK || de->d_type == DT_CHR)
+ continue;
+ TarItem.fn = FileName;
+ TarItem.thread_id = *thread_id;
+ if (de->d_type == DT_DIR && strcmp(de->d_name, ".") != 0 && strcmp(de->d_name, "..") != 0) {
+ 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;
}
@@ -193,6 +497,9 @@
string FileName;
char actual_filename[255];
+ 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
LOGINFO("Path: '%s', archive filename: '%s'\n", Path.c_str(), tarfn.c_str());
@@ -204,8 +511,20 @@
closedir(d);
return -1;
}
- while ((de = readdir(d)) != NULL)
- {
+ while ((de = readdir(d)) != NULL) {
+ // Skip excluded stuff
+ if (split.size() > 0) {
+ skip = false;
+ for (i = 0; i < split.size(); i++) {
+ if (strcmp(de->d_name, split[i].c_str()) == 0) {
+ LOGINFO("excluding %s\n", de->d_name);
+ skip = true;
+ break;
+ }
+ }
+ if (skip)
+ continue;
+ }
FileName = Path + "/";
FileName += de->d_name;
if (has_data_media == 1 && FileName.size() >= 11 && strncmp(FileName.c_str(), "/data/media", 11) == 0)
@@ -234,8 +553,7 @@
if (Archive_Current_Size != 0 && Archive_Current_Size + st.st_size > MAX_ARCHIVE_SIZE) {
LOGINFO("Closing tar '%s', ", tarfn.c_str());
- closeTar(false);
- reinit_libtar_buffer();
+ closeTar();
if (TWFunc::Get_File_Size(tarfn) == 0) {
LOGERR("Backup file size for '%s' is 0 bytes.\n", tarfn.c_str());
return -1;
@@ -277,25 +595,23 @@
Archive_Current_Size = 0;
sprintf(actual_filename, temp.c_str(), Archive_File_Count);
tarfn = actual_filename;
- init_libtar_buffer(0);
+ if (!tarexclude.empty())
+ split = TWFunc::split_string(tarexclude, ' ', true);
createTar();
DataManager::GetValue(TW_HAS_DATA_MEDIA, has_data_media);
gui_print("Creating archive 1...\n");
if (Generate_Multiple_Archives(tardir) < 0) {
LOGERR("Error generating multiple archives\n");
- free_libtar_buffer();
return -1;
}
- closeTar(false);
- free_libtar_buffer();
- LOGINFO("Done, created %i archives.\n", (Archive_File_Count++));
+ closeTar();
+ LOGINFO("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)
+ if (openTar() == -1)
return -1;
if (tar_extract_all(t, charRootDir) != 0) {
LOGERR("Unable to extract tar archive '%s'\n", tarfn.c_str());
@@ -308,37 +624,33 @@
return 0;
}
-int twrpTar::getArchiveType() {
- int type = 0;
- string::size_type i = 0;
- int firstbyte = 0, secondbyte = 0;
- char header[3];
-
- ifstream f;
- f.open(tarfn.c_str(), ios::in | ios::binary);
- f.get(header, 3);
- f.close();
- firstbyte = header[i] & 0xff;
- secondbyte = header[++i] & 0xff;
-
- if (firstbyte == 0x1f && secondbyte == 0x8b)
- type = 1; // Compressed
- else
- type = 0; // Uncompressed
-
- return type;
-}
-
int twrpTar::extract() {
- int Archive_Current_Type = getArchiveType();
+ 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 = extractTGZ();
+ int ret = extractTar();
return ret;
- }
- else {
+ } else if (Archive_Current_Type == 2) {
+ string Password;
+ DataManager::GetValue("tw_restore_password", Password);
+ 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();
}
@@ -348,8 +660,17 @@
DIR* d;
string mainfolder = tardir + "/", subfolder;
char buf[PATH_MAX];
+
+ char excl[1024];
+ string::size_type i;
+ bool skip;
+
d = opendir(tardir.c_str());
- if (d != NULL) {
+ if (d != NULL) {
+ if (!tarexclude.empty()) {
+ strcpy(excl, tarexclude.c_str());
+ split = TWFunc::split_string(tarexclude, ' ', true);
+ }
struct dirent* de;
while ((de = readdir(d)) != NULL) {
#ifdef RECOVERY_SDCARD_ON_DATA
@@ -357,6 +678,21 @@
#endif
if (de->d_type == DT_BLK || de->d_type == DT_CHR || strcmp(de->d_name, "..") == 0)
continue;
+
+ // Skip excluded stuff
+ if (split.size() > 0) {
+ skip = false;
+ for (i = 0; i < split.size(); i++) {
+ if (strcmp(de->d_name, split[i].c_str()) == 0) {
+ LOGINFO("excluding %s\n", de->d_name);
+ skip = true;
+ break;
+ }
+ }
+ if (skip)
+ continue;
+ }
+
subfolder = mainfolder;
if (strcmp(de->d_name, ".") != 0) {
subfolder += de->d_name;
@@ -376,7 +712,7 @@
string temp = Strip_Root_Dir(buf);
charTarPath = (char*) temp.c_str();
}
- if (tar_append_tree(t, buf, charTarPath) != 0) {
+ if (tar_append_tree(t, buf, charTarPath, excl) != 0) {
LOGERR("Error appending '%s' to tar archive '%s'\n", buf, tarfn.c_str());
return -1;
}
@@ -391,103 +727,476 @@
return 0;
}
-int twrpTar::createTGZ() {
- bool gzip = true;
+int twrpTar::tarList(bool include_root, 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];
- init_libtar_buffer(0);
- if (createTar() == -1)
- return -1;
- if (tarDirs(false) == -1)
- return -1;
- if (closeTar(gzip) == -1)
- return -1;
- free_libtar_buffer();
+ basefn = tarfn;
+ temp = basefn + "%i%02i";
+ 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;
+
+ 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++;
+ LOGINFO("Splitting thread ID %i into archive %i\n", thread_id, archive_count);
+ if (archive_count > 99) {
+ LOGINFO("BLAH!\n");
+ 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);
+ }
+ if (addFile(buf, include_root) != 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;
}
int twrpTar::create() {
- bool gzip = false;
init_libtar_buffer(0);
if (createTar() == -1)
return -1;
if (tarDirs(false) == -1)
return -1;
- if (closeTar(gzip) == -1)
+ if (closeTar() == -1)
return -1;
free_libtar_buffer();
return 0;
}
+void* twrpTar::createList(void *cookie) {
+
+ twrpTar* threadTar = (twrpTar*) cookie;
+ if (threadTar->tarList(true, 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();
- static tartype_t type = { open, close, read, write_tar };
- init_libtar_buffer(0);
- if (tar_open(&t, charTarFile, &type, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) == -1)
+ if (tar_open(&t, charTarFile, NULL, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) == -1)
return -1;
removeEOT(charTarFile);
- if (tar_open(&t, charTarFile, &type, O_WRONLY | O_APPEND | O_LARGEFILE, 0644, TAR_GNU) == -1)
+ 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;
}
- flush_libtar_buffer(t->fd);
if (tar_append_eof(t) == -1)
return -1;
if (tar_close(t) == -1)
return -1;
- free_libtar_buffer();
return 0;
}
int twrpTar::createTar() {
char* charTarFile = (char*) tarfn.c_str();
char* charRootDir = (char*) tardir.c_str();
- int use_compression = 0;
static tartype_t type = { open, close, read, write_tar };
+ string Password;
- 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, &type, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) != 0) {
- pclose(p);
+ if (use_encryption && use_compression) {
+ // Compressed and encrypted
+ Archive_Current_Type = 3;
+ LOGINFO("Using encryption and compression...\n");
+ DataManager::GetValue("tw_backup_password", Password);
+ int i, pipes[4];
+
+ if (pipe(pipes) < 0) {
+ LOGERR("Error creating first pipe\n");
return -1;
}
- }
- else {
- if (tar_open(&t, charTarFile, &type, O_WRONLY | O_CREAT | O_LARGEFILE, 0644, TAR_GNU) == -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_IROTH);
+ 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, 0644, TAR_GNU) != 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_IROTH);
+ 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, 0644, TAR_GNU) != 0) {
+ close(fd);
+ LOGERR("tar_fdopen failed\n");
+ return -1;
+ }
+ }
+ } else if (use_encryption) {
+ // Encrypted
+ Archive_Current_Type = 2;
+ LOGINFO("Using encryption...\n");
+ DataManager::GetValue("tw_backup_password", Password);
+ 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_IROTH);
+ 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, 0644, TAR_GNU) != 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, 0644, TAR_GNU) == -1) {
+ LOGERR("tar_open error opening '%s'\n", tarfn.c_str());
+ return -1;
+ }
}
return 0;
}
-int twrpTar::openTar(bool gzip) {
+int twrpTar::openTar() {
char* charRootDir = (char*) tardir.c_str();
char* charTarFile = (char*) tarfn.c_str();
+ string Password;
- if (gzip) {
- LOGINFO("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) {
- LOGINFO("tar_fdopen returned error\n");
- __pclose(pipe);
+ if (Archive_Current_Type == 3) {
+ LOGINFO("Opening encrypted and compressed backup...\n");
+ DataManager::GetValue("tw_restore_password", Password);
+ int i, pipes[4];
+
+ if (pipe(pipes) < 0) {
+ LOGERR("Error creating first pipe\n");
return -1;
}
- }
- else {
- if (tar_open(&t, charTarFile, NULL, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) != 0) {
- LOGERR("Unable to open tar archive '%s'\n", charTarFile);
+ 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, 0644, TAR_GNU) != 0) {
+ close(fd);
+ LOGERR("tar_fdopen failed\n");
+ return -1;
+ }
+ }
+ }
+ } else if (Archive_Current_Type == 2) {
+ LOGINFO("Opening encrypted backup...\n");
+ DataManager::GetValue("tw_restore_password", Password);
+ 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, 0644, TAR_GNU) != 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, 0644, TAR_GNU) != 0) {
+ close(fd);
+ LOGERR("tar_fdopen failed\n");
+ return -1;
+ }
+ }
+ } else if (tar_open(&t, charTarFile, NULL, O_RDONLY | O_LARGEFILE, 0644, TAR_GNU) != 0) {
+ LOGERR("Unable to open tar archive '%s'\n", charTarFile);
+ return -1;
}
return 0;
}
@@ -526,10 +1235,7 @@
return 0;
}
-int twrpTar::closeTar(bool gzip) {
- int use_compression;
- DataManager::GetValue(TW_USE_COMPRESSION_VAR, use_compression);
-
+int twrpTar::closeTar() {
flush_libtar_buffer(t->fd);
if (tar_append_eof(t) != 0) {
LOGERR("tar_append_eof(): %s\n", strerror(errno));
@@ -540,11 +1246,16 @@
LOGERR("Unable to close tar archive: '%s'\n", tarfn.c_str());
return -1;
}
- if (use_compression || gzip) {
- LOGINFO("Closing popen and fd\n");
- pclose(p);
+ if (Archive_Current_Type > 1) {
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();
+ TWFunc::tw_chmod(tarfn, "644");
return 0;
}
@@ -563,51 +1274,55 @@
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) {
- LOGERR("Unable to close tar file\n");
- return -1;
- }
- return 0;
-}
-
int twrpTar::entryExists(string entry) {
char* searchstr = (char*)entry.c_str();
int ret;
- int Archive_Current_Type = getArchiveType();
+ Archive_Current_Type = TWFunc::Get_File_Type(tarfn);
- if (openTar(Archive_Current_Type) == -1)
+ if (openTar() == -1)
ret = 0;
else
ret = tar_find(t, searchstr);
- if (tar_close(t) != 0)
- LOGINFO("Unable to close tar file after searching for entry '%s'.\n", entry.c_str());
+ 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);
}