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untar.c
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/* by munjeni @ 2016 */
#if (!defined(_WIN32)) && (!defined(WIN32)) && (!defined(__APPLE__))
#ifndef __USE_FILE_OFFSET64
#define __USE_FILE_OFFSET64 1
#endif
#ifndef __USE_LARGEFILE64
#define __USE_LARGEFILE64 1
#endif
#ifndef _LARGEFILE64_SOURCE
#define _LARGEFILE64_SOURCE 1
#endif
#ifndef _FILE_OFFSET_BITS
#define _FILE_OFFSET_BITS 64
#endif
#ifndef _FILE_OFFSET_BIT
#define _FILE_OFFSET_BIT 64
#endif
#endif
#ifdef _WIN32
#define __USE_MINGW_ANSI_STDIO 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#ifdef HAS_STDINT_H
#include <stdint.h>
#endif
#if (defined(unix)) || (defined(__APPLE__))
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#else
#include <direct.h>
#include <io.h>
#endif
#if defined(USE_FILE32API)
#define fopen64 fopen
#define ftello64 ftell
#define fseeko64 fseek
#else
#ifdef __FreeBSD__
#define fopen64 fopen
#define ftello64 ftello
#define fseeko64 fseeko
#endif
//#ifdef __ANDROID__
// #define fopen64 fopen
// #define ftello64 ftello
// #define fseeko64 fseeko
//#endif
#ifdef _MSC_VER
#define fopen64 fopen
#if (_MSC_VER >= 1400) && (!(defined(NO_MSCVER_FILE64_FUNC)))
#define ftello64 _ftelli64
#define fseeko64 _fseeki64
#else /* old msc */
#define ftello64 ftell
#define fseeko64 fseek
#endif
#endif
#endif
#if defined(__APPLE__)
#define fopen64 fopen
#define ftello64 ftell
#define fseeko64 fseek
#endif
#ifndef O_BINARY
#define O_BINARY 0x8000
#endif
#define ENABLE_DEBUG 0
#if ENABLE_DEBUG
#define LOG printf
#else
#define LOG(...)
#endif
#include "sparse.h"
#include "lz4.h"
static unsigned short swap_uint16(unsigned short val)
{
return (val >> 8) | (val << 8);
}
static unsigned long swap_uint32(unsigned long val) {
val = ((val << 8) & 0xFF00FF00 ) | ((val >> 8) & 0xFF00FF);
return ((val << 16) | (val >> 16)) & 0xffffffff;
}
static unsigned long long swap_uint64(unsigned long long val) {
val = ((val << 8) & 0xFF00FF00FF00FF00ULL) | ((val >> 8) & 0x00FF00FF00FF00FFULL);
val = ((val << 16) & 0xFFFF0000FFFF0000ULL) | ((val >> 16) & 0x0000FFFF0000FFFFULL);
return ((val << 32) | (val >> 32)) & 0xffffffffffffffffULL;
}
static char *basenamee(char *in) {
char *ssc;
int p = 0;
ssc = strstr(in, "/");
if(ssc == NULL) {
ssc = strstr(in, "\\");
if(ssc == NULL) {
return in;
}
}
do {
p = strlen(ssc) + 1;
in = &in[strlen(in)-p+2];
ssc = strstr(in, "/");
if (ssc == NULL)
ssc = strstr(in, "\\");
} while(ssc);
return in;
}
/*
* "untar" is an extremely simple tar extractor:
* * A single C source file, so it should be easy to compile
* and run on any system with a C compiler.
* * Extremely portable standard C. The only non-ANSI function
* used is mkdir().
* * Reads basic ustar tar archives.
* * Does not require libarchive or any other special library.
*
* To compile: cc -o untar untar.c
*
* Usage: untar <archive>
*
* In particular, this program should be sufficient to extract the
* distribution for libarchive, allowing people to bootstrap
* libarchive on systems that do not already have a tar program.
*
* To unpack libarchive-x.y.z.tar.gz:
* * gunzip libarchive-x.y.z.tar.gz
* * untar libarchive-x.y.z.tar
*
* Written by Tim Kientzle, March 2009.
*
* Released into the public domain.
*/
/* These are all highly standard and portable headers. */
#include <assert.h>
#include "zlib.h"
static uint16_t is_big_endian(void) {
return (*(uint16_t *)"\0\xff" < 0x100) ? 1 : 0;
}
#define CHUNK 16384
/* These are parameters to deflateInit2. See
http://zlib.net/manual.html for the exact meanings. */
#define windowBits 15
#define GZIP_ENCODING 16
/* Compress from file source to file dest until EOF on source.
def() returns Z_OK on success, Z_MEM_ERROR if memory could not be
allocated for processing, Z_STREAM_ERROR if an invalid compression
level is supplied, Z_VERSION_ERROR if the version of zlib.h and the
version of the library linked do not match, or Z_ERRNO if there is
an error reading or writing the files. */
int def(FILE *source, FILE *dest, int level)
{
int ret, flush;
unsigned have;
z_stream strm;
unsigned char in[CHUNK];
unsigned char out[CHUNK];
/* allocate deflate state */
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
ret = deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, windowBits | GZIP_ENCODING, 8, Z_DEFAULT_STRATEGY);
if (ret != Z_OK)
return ret;
/* compress until end of file */
do {
strm.avail_in = fread(in, 1, CHUNK, source);
if (ferror(source)) {
(void)deflateEnd(&strm);
return Z_ERRNO;
}
flush = feof(source) ? Z_FINISH : Z_NO_FLUSH;
strm.next_in = in;
/* run deflate() on input until output buffer not full, finish
compression if all of source has been read in */
do {
strm.avail_out = CHUNK;
strm.next_out = out;
ret = deflate(&strm, flush); /* no bad return value */
assert(ret != Z_STREAM_ERROR); /* state not clobbered */
have = CHUNK - strm.avail_out;
if (fwrite(out, 1, have, dest) != have || ferror(dest)) {
(void)deflateEnd(&strm);
return Z_ERRNO;
}
} while (strm.avail_out == 0);
assert(strm.avail_in == 0); /* all input will be used */
/* done when last data in file processed */
} while (flush != Z_FINISH);
assert(ret == Z_STREAM_END); /* stream will be complete */
/* clean up and return */
(void)deflateEnd(&strm);
return Z_OK;
}
/* Decompress from file source to file dest until stream ends or EOF.
inf() returns Z_OK on success, Z_MEM_ERROR if memory could not be
allocated for processing, Z_DATA_ERROR if the deflate data is
invalid or incomplete, Z_VERSION_ERROR if the version of zlib.h and
the version of the library linked do not match, or Z_ERRNO if there
is an error reading or writing the files. */
int inf(FILE *source, FILE *dest)
{
int ret, progress=0;
unsigned long long have;
z_stream strm;
unsigned char in[CHUNK];
unsigned char out[CHUNK];
/* allocate inflate state */
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
strm.opaque = Z_NULL;
strm.avail_in = 0;
strm.next_in = Z_NULL;
ret = inflateInit2(&strm, 47); /* automatic zlib or gzip decoding */
if (ret != Z_OK)
return ret;
/* decompress until deflate stream ends or end of file */
do {
strm.avail_in = fread(in, 1, CHUNK, source);
if (ferror(source)) {
(void)inflateEnd(&strm);
return Z_ERRNO;
}
if (strm.avail_in == 0)
break;
strm.next_in = in;
/* run inflate() on input until output buffer not full */
do {
strm.avail_out = CHUNK;
strm.next_out = out;
ret = inflate(&strm, Z_NO_FLUSH);
assert(ret != Z_STREAM_ERROR); /* state not clobbered */
switch (ret) {
case Z_NEED_DICT:
ret = Z_DATA_ERROR; /* and fall through */
break;
case Z_DATA_ERROR:
case Z_MEM_ERROR:
(void)inflateEnd(&strm);
return ret;
default:
break;
}
have = CHUNK - strm.avail_out;
if ((have % 4294967296ULL) == 0)
{
progress += 1;
printf(".");
if (progress == 60) {
progress = 0;
printf("\n");
}
}
if (fwrite(out, 1, have, dest) != have || ferror(dest)) {
(void)inflateEnd(&strm);
return Z_ERRNO;
}
} while (strm.avail_out == 0);
/* done when inflate() says it's done */
} while (ret != Z_STREAM_END);
/* clean up and return */
(void)inflateEnd(&strm);
printf("\n");
return ret == Z_STREAM_END ? Z_OK : Z_DATA_ERROR;
}
/* report a zlib or i/o error */
void zerr(int ret)
{
fputs("gzpipe: ", stderr);
switch (ret)
{
case Z_ERRNO:
if (ferror(stdin))
fputs("error reading stdin\n", stderr);
if (ferror(stdout))
fputs("error writing stdout\n", stderr);
break;
case Z_STREAM_ERROR:
fputs("invalid compression level\n", stderr);
break;
case Z_DATA_ERROR:
fputs("invalid or incomplete deflate data\n", stderr);
break;
case Z_MEM_ERROR:
fputs("out of memory\n", stderr);
break;
case Z_VERSION_ERROR:
fputs("zlib version mismatch!\n", stderr);
break;
default:
fputs("ok.\n", stderr);
break;
}
}
static int file_exist(char *file) {
int ret;
FILE *f = NULL;
if ((f = fopen64(file, "rb")) == NULL) {
ret = 0;
} else {
if (f) fclose(f);
ret = 1;
}
return ret;
}
static void remove_file_exist(char *file) {
if (file_exist(file)) {
remove(file);
}
}
int gziper(char *in, char *out)
{
int ret;
FILE *source = NULL;
FILE *zip = NULL;
FILE *zipped = NULL;
FILE *back = NULL;
if ((source = fopen64(in, "rb")) == NULL) {
printf("Could not open %s!\n", in);
return 1;
}
if ((zip = fopen64(out, "wb")) == NULL) {
printf("Could not open %s for write!\n", out);
if (source) fclose(source);
return 1;
}
printf("defflating...\n");
ret = def(source, zip, Z_DEFAULT_COMPRESSION);
printf("defflate returned: %i\n", ret);
if (source) fclose(source);
if (zip) fclose(zip);
if (ret == 0) {
printf ("setting up infflate...\n");
if ((zipped = fopen64(out, "rb")) == NULL) {
printf("Could not open %s for verification!\n", out);
return 1;
}
if ((back = fopen64("tempFcheck", "wb")) == NULL) {
printf("Could not open for write temFcheck file for verification!\n");
if (zipped) fclose(zipped);
return 1;
}
printf ("infflating...\n");
ret = inf(zipped, back);
printf("infflate returned: %i\n", ret);
zerr(ret);
}
if (zipped) fclose(zipped);
if (back) fclose(back);
if (ret != 0) {
remove_file_exist(out);
return 1;
}
remove_file_exist("tempFcheck");
printf("gzip: ok.\n");
return 0;
}
int gunziper(char *in, char *out)
{
int ret;
FILE *zipped = NULL;
FILE *back = NULL;
printf ("setting up infflate...\n");
if ((zipped = fopen64(in, "rb")) == NULL) {
printf("Could not open %s for infflating!\n", in);
return 1;
}
if ((back = fopen64(out, "wb")) == NULL) {
printf("Could not open %s for write!\n", out);
if (zipped) fclose(zipped);
return 1;
}
printf ("infflating...\n");
ret = inf(zipped, back);
printf("infflate returned: %i\n", ret);
zerr(ret);
if (zipped) fclose(zipped);
if (back) fclose(back);
if (ret != 0) {
remove_file_exist(out);
return 1;
}
printf("unziped: ok.\n");
return 0;
}
/* Parse an octal number, ignoring leading and trailing nonsense. */
static int
parseoct(const char *p, size_t n)
{
int i = 0;
while (*p < '0' || *p > '7') {
++p;
--n;
}
while (*p >= '0' && *p <= '7' && n > 0)
{
i *= 8;
i += *p - '0';
++p;
--n;
}
return (i);
}
/* Returns true if this is 512 zero bytes. */
static int
is_end_of_archive(const char *p)
{
int n;
for (n = 511; n >= 0; --n)
if (p[n] != '\0')
return (0);
return (1);
}
/* Create a file, including parent directory as necessary. */
static FILE *
create_file(char *pathname, int mode)
{
FILE *f = fopen64(pathname, "wb");
return (f);
}
/* Verify the tar checksum. */
static int
verify_checksum(const char *p)
{
int n, u = 0;
for (n = 0; n < 512; ++n) {
if (n < 148 || n > 155)
/* Standard tar checksum adds unsigned bytes. */
u += ((unsigned char *)p)[n];
else
u += 0x20;
}
return (u == parseoct(p + 148, 8));
}
/* Extract a tar archive. */
void
untar(FILE *a, const char *path, char *outfolder)
{
char buff[512];
FILE *f = NULL;
unsigned long bytes_read;
unsigned long bytes_write;
unsigned long filesize;
unsigned int i=0;
unsigned short sparse=0;
char tmpp[256];
char tmpg[256];
unsigned short file_type = 1;
unsigned short is_be = is_big_endian();
printf("Extracting from %s\n", path);
for (;;)
{
unsigned int chunk = 0;
bytes_read = fread(buff, 1, 512, a);
if (bytes_read < 512) {
printf("Short read on %s: expected 512, got 0x%lx\n", path, bytes_read);
return;
}
if (is_end_of_archive(buff))
{
printf("End of %s\n", path);
if (sparse)
{
unsigned int j;
FILE *in = NULL;
FILE *out = NULL;
unsigned long long ext4_file_size = 0;
unsigned short searched = 0;
memset(tmpg, 0, sizeof(tmpg));
memcpy(tmpg, path, strlen(path)-4);
snprintf(tmpp, sizeof(tmpp), "%s/%s.bin", outfolder, basenamee(tmpg));
out = fopen64(tmpp, "wb");
if (out == NULL) {
printf("Cannot open output file %s\n", tmpp);
fclose(f);
exit(-1);
}
printf("found image with total %d chunks.\n", i-1);
for (j=0; j<i-1; ++j)
{
struct SparseHeader sparseHeader;
unsigned int si = 0;
fseeko64(out, 0, SEEK_SET);
memset(tmpg, 0, sizeof(tmpg));
memcpy(tmpg, path, strlen(path)-4);
snprintf(tmpp, sizeof(tmpp), "%s/%s.%03d", outfolder, basenamee(tmpg), j);
in = fopen64(tmpp, "rb");
if (in == NULL) {
printf("Cannot open input file %s\n", tmpp);
fclose(f);
fclose(out);
exit(-1);
}
printf("Processing %s\n", tmpp);
bytes_read = fread(&sparseHeader, 1, sizeof(struct SparseHeader), in);
if (bytes_read < sizeof(struct SparseHeader)) {
printf("Short read SparseHeader: Expected 0x%lx, got 0x%lx\n", (unsigned long)sizeof(struct SparseHeader), bytes_read);
fclose(f);
fclose(in);
fclose(out);
return;
}
if (is_be) {
sparseHeader.Magic = swap_uint32(sparseHeader.Magic);
sparseHeader.MajorVersion = swap_uint16(sparseHeader.MajorVersion);
sparseHeader.MinorVersion = swap_uint16(sparseHeader.MinorVersion);
sparseHeader.FileHeaderSize = swap_uint16(sparseHeader.FileHeaderSize);
sparseHeader.ChunkHeaderSize = swap_uint16(sparseHeader.ChunkHeaderSize);
sparseHeader.BlockSize = swap_uint32(sparseHeader.BlockSize);
sparseHeader.TotalBlocks = swap_uint32(sparseHeader.TotalBlocks);
sparseHeader.TotalChunks = swap_uint32(sparseHeader.TotalChunks);
sparseHeader.ImageChecksum = swap_uint32(sparseHeader.ImageChecksum);
}
if (sparseHeader.Magic != SPARSE_HEADER_MAGIC)
{
printf("Error, sparseHeader.Magic != 0xED26FF3A, got 0x%08x\n", sparseHeader.Magic);
fclose(f);
fclose(in);
fclose(out);
return;
}
if (sparseHeader.FileHeaderSize != 28)
{
printf("Error, sparseHeader.FileHeaderSize != 28, got %d\n", sparseHeader.FileHeaderSize);
fclose(f);
fclose(in);
fclose(out);
return;
}
if (sparseHeader.ChunkHeaderSize != 12)
{
printf("Error, sparseHeader.ChunkHeaderSize != 12, got %d\n", sparseHeader.ChunkHeaderSize);
fclose(f);
fclose(in);
fclose(out);
return;
}
if (sparseHeader.TotalChunks == 0)
{
printf("Error, sparseHeader.TotalChunks == 0!\n");
fclose(f);
fclose(in);
fclose(out);
return;
}
LOG("Sparse magic: 0x%08X\n", sparseHeader.Magic);
LOG("Sparse MajorVersion: 0x%04X\n", sparseHeader.MajorVersion);
LOG("Sparse MinorVersion: 0x%04X\n", sparseHeader.MinorVersion);
LOG("Sparse FileHeaderSize: 0x%04X\n", sparseHeader.FileHeaderSize);
LOG("Sparse ChunkHeaderSize: 0x%04X\n", sparseHeader.ChunkHeaderSize);
LOG("Sparse BlockSize: 0x%08X\n", sparseHeader.BlockSize);
LOG("Sparse TotalBlocks: 0x%08X\n", sparseHeader.TotalBlocks);
LOG("Sparse TotalChunks: 0x%08X\n", sparseHeader.TotalChunks);
LOG("Sparse ImageChecksum: 0x%08X\n", sparseHeader.ImageChecksum);
while (si < sparseHeader.TotalChunks)
{
struct ChunkHeader chunkHeader;
unsigned long long sj = 0LL;
unsigned int sk = 0;
unsigned long sparse_data_in_sz = 0L;
unsigned long long sparse_data_out_sz = 0LL;
char *tmp_buff = NULL;
char *lz4_tmp_buff = NULL;
int lz4_return_value;
unsigned long long curr_out_poss = ftello64(out);
bytes_read = fread(&chunkHeader, 1, sizeof(struct ChunkHeader), in);
if (bytes_read < sizeof(struct ChunkHeader)) {
printf("Short read ChunkHeader: Expected 0x%lx, got 0x%lx\n", (unsigned long)sizeof(struct ChunkHeader), bytes_read);
fclose(f);
fclose(in);
fclose(out);
return;
}
if (is_be) {
chunkHeader.ChunkType = swap_uint16(chunkHeader.ChunkType);
//chunkHeader.Reserved = swap_uint16(chunkHeader.Reserved);
chunkHeader.ChunkBlocks = swap_uint32(chunkHeader.ChunkBlocks);
chunkHeader.ChunkSize = swap_uint32(chunkHeader.ChunkSize);
}
sparse_data_in_sz = chunkHeader.ChunkSize - sparseHeader.ChunkHeaderSize;
sparse_data_out_sz = (chunkHeader.ChunkBlocks + 0LL) * (sparseHeader.BlockSize + 0LL);
LOG("ChunkHeader ChunkType: 0x%04X\n", chunkHeader.ChunkType);
LOG("ChunkHeader Reserved: 0x%04X\n", chunkHeader.Reserved);
LOG("ChunkHeader ChunkBlocks: 0x%08X\n", chunkHeader.ChunkBlocks);
LOG("ChunkHeader ChunkSize: 0x%08X\n", chunkHeader.ChunkSize);
switch (chunkHeader.ChunkType)
{
case CHUNK_TYPE_RAW:
LOG("RAW NOW=%llX\n", curr_out_poss);
for (sk = 0; sk < chunkHeader.ChunkBlocks; ++sk)
{
if ((tmp_buff = (char *)malloc(sparseHeader.BlockSize + 1)) == NULL) {
printf("Error in CHUNK_TYPE_RAW, error allocating memory of the 0x%x bytes for temp_buff!\n", sparseHeader.BlockSize);
fclose(f);
fclose(in);
fclose(out);
return;
}
bytes_read = fread(tmp_buff, 1, sparseHeader.BlockSize, in);
if ((unsigned int)bytes_read < sparseHeader.BlockSize) {
printf("Error in CHUNK_TYPE_RAW, error copying 0x%x bytes to temp_buff, done 0x%lx!\n", sparseHeader.BlockSize, bytes_read);
fclose(f);
fclose(in);
fclose(out);
free(tmp_buff);
return;
}
LOG("RAW=%llX\n", curr_out_poss + sparseHeader.BlockSize);
bytes_write = fwrite(tmp_buff, 1, sparseHeader.BlockSize, out);
if ((unsigned int)bytes_write < sparseHeader.BlockSize) {
printf("Error in CHUNK_TYPE_RAW, error writing 0x%x bytes from temp_buff, done 0x%lx!\n", sparseHeader.BlockSize, bytes_write);
fclose(f);
fclose(in);
fclose(out);
free(tmp_buff);
return;
}
curr_out_poss += sparseHeader.BlockSize;
if (j == 0 && !searched)
{
unsigned int gg;
for (gg=0; gg<sparseHeader.BlockSize - 4; ++gg)
{
if (memcmp(tmp_buff+gg, "\x7f\x45\x4c\x46", 4) == 0 && gg == 0) {
file_type = 2; /* ELF */
printf("Filetype ELF.\n");
break;
}
else if (memcmp(tmp_buff+gg, "\x53\xef", 2) == 0) {
file_type = 3; /* EXT4 */
ext4_file_size = *(unsigned long long *)&tmp_buff[gg-52] * sparseHeader.BlockSize;
if (is_be)
ext4_file_size = swap_uint64(ext4_file_size);
printf("Found ext4 magic. Ext4 size: 0x%llx\n", ext4_file_size);
break;
}
else if (memcmp(tmp_buff+gg, "\xeb\x3c\x90\x4d", 4) == 0 && gg == 0) {
file_type = 4; /* MSDOS VFAT */
printf("Filetype VFAT.\n");
break;
}
else if (memcmp(tmp_buff+gg, "\x41\x4e\x44\x52", 4) == 0 && gg == 0) {
file_type = 5; /* ANDROID IMG */
printf("Filetype IMG.\n");
break;
}
}
searched = 1;
}
free(tmp_buff);
}
LOG("RAW END=%llX\n\n", curr_out_poss);
break;
case CHUNK_TYPE_FILL:
LOG("FILL NOW=%llX\n", curr_out_poss);
if ((tmp_buff = (char *)malloc(sparse_data_in_sz + 1)) == NULL) {
printf("Error in CHUNK_TYPE_FILL, error allocating memory of the 0x%lx bytes for temp_buff!\n", sparse_data_in_sz);
fclose(f);
fclose(in);
fclose(out);
return;
}
bytes_read = fread(tmp_buff, 1, sparse_data_in_sz, in);
if (bytes_read < sparse_data_in_sz) {
printf("Error in CHUNK_TYPE_FILL, error copying 0x%lx bytes to temp_buff, done 0x%lx!\n", sparse_data_in_sz, bytes_read);
fclose(f);
fclose(in);
fclose(out);
free(tmp_buff);
return;
}
for (sj = 0; sj < sparse_data_out_sz; sj += sparse_data_in_sz)
{
LOG("FILL=%llX\n", curr_out_poss + sparse_data_in_sz);
bytes_write = fwrite(tmp_buff, 1, sparse_data_in_sz, out);
if (bytes_write < sparse_data_in_sz) {
printf("Error in CHUNK_TYPE_FILL, error writing 0x%lx bytes from temp_buff, done 0x%lx!\n", sparse_data_in_sz, bytes_write);
fclose(f);
fclose(in);
fclose(out);
free(tmp_buff);
return;
}
curr_out_poss += sparse_data_in_sz;
}
free(tmp_buff);
LOG("FILL END=%llX\n\n", curr_out_poss);
break;
case CHUNK_TYPE_DONT_CARE:
LOG("DONTCARE NOW=%llX\n", curr_out_poss);
curr_out_poss += sparse_data_out_sz;
fseeko64(out, curr_out_poss, SEEK_SET);
LOG("DONTCARE END=%llX\n\n", curr_out_poss);
break;
case CHUNK_TYPE_CRC32:
LOG("CRC32\n\n");
fseeko64(in, sparse_data_in_sz, SEEK_CUR);
break;
case CHUNK_TYPE_LZ4:
LOG("LZ4 NOW=%llX\n", curr_out_poss);
if ((tmp_buff = (char *)malloc(sparse_data_in_sz + 1)) == NULL) {
printf("Error in CHUNK_TYPE_LZ4, error allocating memory of the 0x%lx bytes for temp_buff!\n", sparse_data_in_sz);
fclose(f);
fclose(in);
fclose(out);
return;
}
if ((lz4_tmp_buff = (char *)malloc((unsigned long)sparse_data_out_sz + 1)) == NULL) {
printf("Error in CHUNK_TYPE_LZ4, error allocating memory of the 0x%lx bytes for lz4_temp_buff!\n", (unsigned long)sparse_data_out_sz);
fclose(f);
fclose(in);
fclose(out);
free(tmp_buff);
return;
}
bytes_read = fread(tmp_buff, 1, sparse_data_in_sz, in);
if (bytes_read < sparse_data_in_sz) {
printf("Error in CHUNK_TYPE_LZ4, error copying 0x%lx bytes to temp_buff, done 0x%lx!\n", sparse_data_in_sz, bytes_read);
fclose(f);
fclose(in);
fclose(out);
free(tmp_buff);
free(lz4_tmp_buff);
return;
}
lz4_return_value = LZ4_decompress_safe(tmp_buff, lz4_tmp_buff, sparse_data_in_sz, (unsigned long)sparse_data_out_sz);
if (lz4_return_value < 0)
printf("A negative result from LZ4_decompress_fast indicates a failure trying to decompress the data. See exit code (echo $?) for value returned!\n");
if (lz4_return_value == 0)
printf("I'm not sure this function can ever return 0. Documentation in lz4.h doesn't indicate so!\n");
if (lz4_return_value <= 0) {
printf("Error decompessing lz4 chunk!\n");
fclose(f);
fclose(in);
fclose(out);
free(tmp_buff);
free(lz4_tmp_buff);
return;
}
LOG("LZ4=%llX\n", curr_out_poss + sparse_data_out_sz);
bytes_write = fwrite(lz4_tmp_buff, 1, (unsigned long)sparse_data_out_sz, out);
if (bytes_write < (unsigned long)sparse_data_out_sz) {
printf("Error in CHUNK_TYPE_LZ4, error writing 0x%lx bytes from lz4_temp_buff, done 0x%lx!\n", (unsigned long)sparse_data_out_sz, bytes_write);
fclose(f);
fclose(in);
fclose(out);
free(tmp_buff);
free(lz4_tmp_buff);
return;
}
curr_out_poss += sparse_data_out_sz;
if (j == 0 && !searched)
{
unsigned long gg;
for (gg=0; gg < (unsigned long)sparse_data_out_sz - 4; ++gg)
{
if (memcmp(lz4_tmp_buff+gg, "\x7f\x45\x4c\x46", 4) == 0 && gg == 0) {
file_type = 2; /* ELF */
printf("Filetype ELF.\n");
break;
}
else if (memcmp(lz4_tmp_buff+gg, "\x53\xef", 2) == 0) {
file_type = 3; /* EXT4 */
ext4_file_size = *(unsigned long long *)&lz4_tmp_buff[gg-52] * sparseHeader.BlockSize;
if (is_be)
ext4_file_size = swap_uint64(ext4_file_size);
printf("Found ext4 magic. Ext4 size: 0x%llx\n", ext4_file_size);
break;
}
else if (memcmp(lz4_tmp_buff+gg, "\xeb\x3c\x90\x4d", 4) == 0 && gg == 0) {
file_type = 4; /* MSDOS VFAT */
printf("Filetype VFAT.\n");
break;
}
else if (memcmp(lz4_tmp_buff+gg, "\x41\x4e\x44\x52", 4) == 0 && gg == 0) {
file_type = 5; /* ANDROID IMG */
printf("Filetype IMG.\n");
break;
}
}
searched = 1;
}
free(tmp_buff);
free(lz4_tmp_buff);
LOG("LZ4 END=%llX\n\n", curr_out_poss);
break;
default:
printf("Error, unknown chunk type 0x%x !\n\n", chunkHeader.ChunkType);
fclose(f);
fclose(in);
fclose(out);
return;
}
si += 1;
}
fclose(in);
remove(tmpp);
}
memset(tmpg, 0, sizeof(tmpg));
memcpy(tmpg, path, strlen(path)-4);
snprintf(tmpp, sizeof(tmpp), "%s/%s.bin", outfolder, basenamee(tmpg));
if (ext4_file_size)
{
if (ftello64(out) <= ext4_file_size)
{
char nn[1];
memset(nn, 0, sizeof(nn));
fseeko64(out, ext4_file_size - 1, SEEK_SET);
bytes_read = fread(nn, 1, 1, out);
fseeko64(out, ext4_file_size - 1, SEEK_SET);
fwrite(nn, 1, 1, out);
}
}
fclose(out);
switch (file_type)
{
case 2:
snprintf(tmpp, sizeof(tmpp), "%s/%s.elf", outfolder, basenamee(tmpg));
memcpy(tmpg, tmpp, sizeof(tmpp));
tmpg[strlen(tmpp)-3] = 'b';
tmpg[strlen(tmpp)-2] = 'i';
tmpg[strlen(tmpp)-1] = 'n';
remove(tmpp);
rename(tmpg, tmpp);
break;
case 3:
snprintf(tmpp, sizeof(tmpp), "%s/%s.ext4", outfolder, basenamee(tmpg));
memcpy(tmpg, tmpp, sizeof(tmpp));
tmpg[strlen(tmpp)-4] = 'b';
tmpg[strlen(tmpp)-3] = 'i';
tmpg[strlen(tmpp)-2] = 'n';
tmpg[strlen(tmpp)-1] = '\0';
remove(tmpp);
rename(tmpg, tmpp);
break;
case 4:
snprintf(tmpp, sizeof(tmpp), "%s/%s.vfat", outfolder, basenamee(tmpg));
memcpy(tmpg, tmpp, sizeof(tmpp));
tmpg[strlen(tmpp)-4] = 'b';
tmpg[strlen(tmpp)-3] = 'i';
tmpg[strlen(tmpp)-2] = 'n';
tmpg[strlen(tmpp)-1] = '\0';
remove(tmpp);
rename(tmpg, tmpp);
break;
case 5:
snprintf(tmpp, sizeof(tmpp), "%s/%s.img", outfolder, basenamee(tmpg));
memcpy(tmpg, tmpp, sizeof(tmpp));
tmpg[strlen(tmpp)-3] = 'b';
tmpg[strlen(tmpp)-2] = 'i';
tmpg[strlen(tmpp)-1] = 'n';
remove(tmpp);
rename(tmpg, tmpp);
break;
default:
break;
}
printf("%s created.\n", tmpp);
}
return;
}
if (!verify_checksum(buff)) {
printf("Checksum failure\n");
return;
}
filesize = parseoct(buff + 124, 12);
switch (buff[156])
{
case '1':
printf("Ignoring hardlink %s\n", buff);
break;
case '2':
printf("Ignoring symlink %s\n", buff);
break;
case '3':
printf("Ignoring character device %s\n", buff);