ckolivas/lrzip
1
0
Fork 0
mirror of https://github.com/ckolivas/lrzip.git synced 2025-12-06 07:12:00 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity
lrzip/lrzip.c
Con Kolivas dfcce76594 BE #7 fixes.
2011-03-21 21:35:25 +11:00

1042 lines
30 KiB
C
Raw Blame History

/*
Copyright (C) 2006-2011 Con Kolivas
Copyright (C) 2011 Peter Hyman
Copyright (C) 1998-2003 Andrew Tridgell
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#include <fcntl.h>
#include <sys/statvfs.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <arpa/inet.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <sys/mman.h>
#include <sys/time.h>
#include <termios.h>
#include <endian.h>
#include "md5.h"
#include "rzip.h"
#include "runzip.h"
#include "util.h"
#include "stream.h"
#include "liblrzip.h" /* flag defines */
#define MAGIC_LEN (24)
static i64 fdout_seekto(rzip_control *control, i64 pos)
{
if (TMP_OUTBUF) {
pos -= control->out_relofs;
control->out_ofs = pos;
if (unlikely(pos > control->out_len || pos < 0)) {
print_err("Trying to seek to %lld outside tmp outbuf in fdout_seekto\n", pos);
return -1;
}
return 0;
}
return lseek(control->fd_out, pos, SEEK_SET);
}
void write_magic(rzip_control *control)
{
char magic[MAGIC_LEN];
memset(magic, 0, MAGIC_LEN);
strcpy(magic, "LRZI");
magic[4] = LRZIP_MAJOR_VERSION;
magic[5] = LRZIP_MINOR_VERSION;
/* File size is stored as zero for streaming STDOUT blocks when the
* file size is unknown. In encrypted files, the size is left unknown
* and instead the salt is stored here to preserve space. */
if (ENCRYPT)
memcpy(&magic[6], &control->salt, 8);
else if (!STDIN || !STDOUT || control->eof) {
i64 esize = htole64(control->st_size);
memcpy(&magic[6], &esize, 8);
}
/* save LZMA compression flags */
if (LZMA_COMPRESS) {
int i;
for (i = 0; i < 5; i++)
magic[i + 16] = (char)control->lzma_properties[i];
}
/* This is a flag that the archive contains an md5 sum at the end
* which can be used as an integrity check instead of crc check.
* crc is still stored for compatibility with 0.5 versions.
*/
magic[21] = 1;
if (ENCRYPT)
magic[22] = 1;
if (unlikely(fdout_seekto(control, 0)))
fatal("Failed to seek to BOF to write Magic Header\n");
if (unlikely(put_fdout(control, magic, MAGIC_LEN) != MAGIC_LEN))
fatal("Failed to write magic header\n");
control->magic_written = 1;
}
static inline i64 enc_loops(uchar b1, uchar b2)
{
return (i64)b2 << (i64)b1;
}
static void get_magic(rzip_control *control, char *magic)
{
int encrypted, md5, i;
i64 expected_size;
uint32_t v;
if (unlikely(strncmp(magic, "LRZI", 4)))
failure("Not an lrzip file\n");
memcpy(&control->major_version, &magic[4], 1);
memcpy(&control->minor_version, &magic[5], 1);
print_verbose("Detected lrzip version %d.%d file.\n", control->major_version, control->minor_version);
if (control->major_version > LRZIP_MAJOR_VERSION ||
(control->major_version == LRZIP_MAJOR_VERSION && control->minor_version > LRZIP_MINOR_VERSION))
print_output("Attempting to work with file produced by newer lrzip version %d.%d file.\n", control->major_version, control->minor_version);
/* Support the convoluted way we described size in versions < 0.40 */
if (control->major_version == 0 && control->minor_version < 4) {
memcpy(&v, &magic[6], 4);
expected_size = ntohl(v);
memcpy(&v, &magic[10], 4);
expected_size |= ((i64)ntohl(v)) << 32;
} else {
memcpy(&expected_size, &magic[6], 8);
expected_size = le64toh(expected_size);
}
control->st_size = expected_size;
/* restore LZMA compression flags only if stored */
if ((int) magic[16]) {
for (i = 0; i < 5; i++)
control->lzma_properties[i] = magic[i + 16];
}
/* Whether this archive contains md5 data at the end or not */
md5 = magic[21];
if (md5) {
if (md5 == 1)
control->flags |= FLAG_MD5;
else
print_verbose("Unknown hash, falling back to CRC\n");
}
encrypted = magic[22];
if (encrypted) {
if (encrypted == 1)
control->flags |= FLAG_ENCRYPT;
else
failure("Unkown encryption\n");
/* In encrypted files, the size field is used to store the salt
* instead and the size is unknown, just like a STDOUT chunked
* file */
memcpy(&control->salt, &magic[6], 8);
control->st_size = expected_size = 0;
control->encloops = enc_loops(control->salt[0], control->salt[1]);
print_maxverbose("Encryption hash loops %lld\n", control->encloops);
} else if (ENCRYPT) {
print_output("Asked to decrypt a non-encrypted archive. Bypassing decryption.\n");
control->flags &= ~FLAG_ENCRYPT;
}
}
void read_magic(rzip_control *control, int fd_in, i64 *expected_size)
{
char magic[MAGIC_LEN];
memset(magic, 0, sizeof(magic));
/* Initially read only <v0.6x header */
if (unlikely(read(fd_in, magic, 24) != 24))
fatal("Failed to read magic header\n");
get_magic(control, magic);
*expected_size = control->st_size;
}
/* preserve ownership and permissions where possible */
void preserve_perms(rzip_control *control, int fd_in, int fd_out)
{
struct stat st;
if (unlikely(fstat(fd_in, &st)))
fatal("Failed to fstat input file\n");
if (unlikely(fchmod(fd_out, (st.st_mode & 0777))))
print_err("Warning, unable to set permissions on %s\n", control->outfile);
/* chown fail is not fatal */
if (unlikely(fchown(fd_out, st.st_uid, st.st_gid)))
print_err("Warning, unable to set owner on %s\n", control->outfile);
}
/* Open a temporary outputfile to emulate stdout */
int open_tmpoutfile(rzip_control *control)
{
int fd_out;
if (STDOUT && !TEST_ONLY)
print_verbose("Outputting to stdout.\n");
if (control->tmpdir) {
control->outfile = realloc(NULL, strlen(control->tmpdir) + 16);
if (unlikely(!control->outfile))
fatal("Failed to allocate outfile name\n");
strcpy(control->outfile, control->tmpdir);
strcat(control->outfile, "lrzipout.XXXXXX");
} else {
control->outfile = realloc(NULL, 16);
if (unlikely(!control->outfile))
fatal("Failed to allocate outfile name\n");
strcpy(control->outfile, "lrzipout.XXXXXX");
}
fd_out = mkstemp(control->outfile);
if (unlikely(fd_out == -1))
fatal("Failed to create out tmpfile: %s\n", control->outfile);
register_outfile(control->outfile, TEST_ONLY || STDOUT || !KEEP_BROKEN);
return fd_out;
}
static void fwrite_stdout(void *buf, i64 len)
{
uchar *offset_buf = buf;
ssize_t ret;
i64 total;
total = 0;
while (len > 0) {
if (len > one_g)
ret = one_g;
else
ret = len;
ret = fwrite(offset_buf, 1, ret, stdout);
if (unlikely(ret <= 0))
fatal("Failed to fwrite in fwrite_stdout\n");
len -= ret;
offset_buf += ret;
total += ret;
}
fflush(stdout);
}
void write_fdout(rzip_control *control, void *buf, i64 len)
{
uchar *offset_buf = buf;
ssize_t ret;
while (len > 0) {
ret = MIN(len, one_g);
ret = write(control->fd_out, offset_buf, (size_t)ret);
if (unlikely(ret <= 0))
fatal("Failed to write to fd_out in write_fdout\n");
len -= ret;
offset_buf += ret;
}
}
void flush_tmpoutbuf(rzip_control *control)
{
if (!TEST_ONLY) {
print_maxverbose("Dumping buffer to physical file.\n");
if (STDOUT)
fwrite_stdout(control->tmp_outbuf, control->out_len);
else
write_fdout(control, control->tmp_outbuf, control->out_len);
}
control->out_relofs += control->out_len;
control->out_ofs = control->out_len = 0;
}
/* Dump temporary outputfile to perform stdout */
void dump_tmpoutfile(rzip_control *control, int fd_out)
{
FILE *tmpoutfp;
int tmpchar;
/* flush anything not yet in the temporary file */
fsync(fd_out);
tmpoutfp = fdopen(fd_out, "r");
if (unlikely(tmpoutfp == NULL))
fatal("Failed to fdopen out tmpfile\n");
rewind(tmpoutfp);
if (!TEST_ONLY) {
print_verbose("Dumping temporary file to stdout.\n");
while ((tmpchar = fgetc(tmpoutfp)) != EOF)
putchar(tmpchar);
fflush(stdout);
rewind(tmpoutfp);
}
if (unlikely(ftruncate(fd_out, 0)))
fatal("Failed to ftruncate fd_out in dump_tmpoutfile\n");
}
/* Used if we're unable to read STDIN into the temporary buffer, shunts data
* to temporary file */
void write_fdin(rzip_control *control)
{
uchar *offset_buf = control->tmp_inbuf;
i64 len = control->in_len;
ssize_t ret;
while (len > 0) {
ret = MIN(len, one_g);
ret = write(control->fd_in, offset_buf, (size_t)ret);
if (unlikely(ret <= 0))
fatal("Failed to write to fd_in in write_fdin\n");
len -= ret;
offset_buf += ret;
}
}
/* Open a temporary inputfile to perform stdin decompression */
int open_tmpinfile(rzip_control *control)
{
int fd_in;
if (control->tmpdir) {
control->infile = malloc(strlen(control->tmpdir) + 15);
if (unlikely(!control->infile))
fatal("Failed to allocate infile name\n");
strcpy(control->infile, control->tmpdir);
strcat(control->infile, "lrzipin.XXXXXX");
} else {
control->infile = malloc(15);
if (unlikely(!control->infile))
fatal("Failed to allocate infile name\n");
strcpy(control->infile, "lrzipin.XXXXXX");
}
fd_in = mkstemp(control->infile);
if (unlikely(fd_in == -1))
fatal("Failed to create in tmpfile: %s\n", control->infile);
register_infile(control->infile, (DECOMPRESS || TEST_ONLY) && STDIN);
/* Unlink temporary file immediately to minimise chance of files left
* lying around in cases of failure. */
if (unlikely(unlink(control->infile)))
fatal("Failed to unlink tmpfile: %s\n", control->infile);
return fd_in;
}
static void read_tmpinmagic(rzip_control *control)
{
char magic[MAGIC_LEN];
int i, tmpchar;
memset(magic, 0, sizeof(magic));
for (i = 0; i < 24; i++) {
tmpchar = getchar();
if (unlikely(tmpchar == EOF))
failure("Reached end of file on STDIN prematurely on v05 magic read\n");
magic[i] = (char)tmpchar;
}
get_magic(control, magic);
}
/* Read data from stdin into temporary inputfile */
void read_tmpinfile(rzip_control *control, int fd_in)
{
FILE *tmpinfp;
int tmpchar;
if (control->flags & FLAG_SHOW_PROGRESS)
fprintf(control->msgout, "Copying from stdin.\n");
tmpinfp = fdopen(fd_in, "w+");
if (unlikely(tmpinfp == NULL))
fatal("Failed to fdopen in tmpfile\n");
while ((tmpchar = getchar()) != EOF)
fputc(tmpchar, tmpinfp);
fflush(tmpinfp);
rewind(tmpinfp);
}
/* To perform STDOUT, we allocate a proportion of ram that is then used as
* a pseudo-temporary file */
static void open_tmpoutbuf(rzip_control *control)
{
control->flags |= FLAG_TMP_OUTBUF;
control->out_maxlen = control->maxram;
/* Allocate slightly more so we can cope when the buffer overflows and
* fall back to a real temporary file */
control->tmp_outbuf = malloc(control->maxram + control->page_size);
if (unlikely(!control->tmp_outbuf))
fatal("Failed to malloc tmp_outbuf in open_tmpoutbuf\n");
if (!DECOMPRESS && !TEST_ONLY)
control->out_ofs = control->out_len = MAGIC_LEN;
}
void close_tmpoutbuf(rzip_control *control)
{
control->flags &= ~FLAG_TMP_OUTBUF;
free(control->tmp_outbuf);
}
static void open_tmpinbuf(rzip_control *control)
{
control->flags |= FLAG_TMP_INBUF;
control->in_maxlen = control->maxram;
control->tmp_inbuf = malloc(control->maxram + control->page_size);
if (unlikely(!control->tmp_inbuf))
fatal("Failed to malloc tmp_inbuf in open_tmpinbuf\n");
}
inline void clear_tmpinbuf(rzip_control *control)
{
control->in_len = control->in_ofs = 0;
}
void clear_tmpinfile(rzip_control *control)
{
if (unlikely(lseek(control->fd_in, 0, SEEK_SET)))
fatal("Failed to lseek on fd_in in clear_tmpinfile\n");
if (unlikely(ftruncate(control->fd_in, 0)))
fatal("Failed to truncate fd_in in clear_tmpinfile\n");
}
void close_tmpinbuf(rzip_control *control)
{
control->flags &= ~FLAG_TMP_INBUF;
free(control->tmp_inbuf);
}
static int get_pass(char *s)
{
int len;
memset(s, 0, PASS_LEN - SALT_LEN);
if (unlikely(fgets(s, PASS_LEN - SALT_LEN, stdin) == NULL))
failure("Failed to retrieve passphrase\n");
len = strlen(s);
if (len > 0 && ('\r' == s[len - 1] || '\n' == s[len - 1]))
s[len - 1] = '\0';
if (len > 1 && ('\r' == s[len - 2] || '\n' == s[len - 2]))
s[len - 2] = '\0';
len = strlen(s);
if (unlikely(0 == len))
failure("Empty passphrase\n");
return len;
}
static void get_hash(rzip_control *control, int make_hash)
{
char *passphrase, *testphrase;
struct termios termios_p;
i64 i;
int j;
passphrase = calloc(PASS_LEN, 1);
testphrase = calloc(PASS_LEN, 1);
control->salt_pass = calloc(PASS_LEN, 1);
control->hash = calloc(HASH_LEN, 1);
if (unlikely(!passphrase || !testphrase || !control->salt_pass || !control->hash))
fatal("Failed to calloc encrypt buffers in compress_file\n");
mlock(passphrase, PASS_LEN);
mlock(testphrase, PASS_LEN);
mlock(control->salt_pass, PASS_LEN);
mlock(control->hash, HASH_LEN);
/* Disable stdin echo to screen */
tcgetattr(fileno(stdin), &termios_p);
termios_p.c_lflag &= ~ECHO;
tcsetattr(fileno(stdin), 0, &termios_p);
retry_pass:
print_output("Enter passphrase: ");
control->salt_pass_len = get_pass(passphrase) + SALT_LEN;
print_output("\n");
if (make_hash) {
print_output("Re-enter passphrase: ");
get_pass(testphrase);
print_output("\n");
if (strcmp(passphrase, testphrase)) {
print_output("Passwords do not match. Try again.\n");
goto retry_pass;
}
}
termios_p.c_lflag |= ECHO;
tcsetattr(fileno(stdin), 0, &termios_p);
memset(testphrase, 0, PASS_LEN);
munlock(testphrase, PASS_LEN);
free(testphrase);
memcpy(control->salt_pass, control->salt, SALT_LEN);
memcpy(control->salt_pass + SALT_LEN, passphrase, PASS_LEN - SALT_LEN);
lrz_stretch(control);
memset(passphrase, 0, PASS_LEN);
munlock(passphrase, PASS_LEN);
free(passphrase);
}
static void release_hashes(rzip_control *control)
{
memset(control->salt_pass, 0, PASS_LEN);
memset(control->hash, 0, SALT_LEN);
munlockall();
free(control->salt_pass);
free(control->hash);
}
/*
decompress one file from the command line
*/
void decompress_file(rzip_control *control)
{
char *tmp, *tmpoutfile, *infilecopy = NULL;
int fd_in, fd_out = -1, fd_hist = -1;
i64 expected_size, free_space;
struct statvfs fbuf;
if (!STDIN) {
if ((tmp = strrchr(control->infile, '.')) && strcmp(tmp,control->suffix)) {
/* make sure infile has an extension. If not, add it
* because manipulations may be made to input filename, set local ptr
*/
infilecopy = malloc(strlen(control->infile) + strlen(control->suffix) + 1);
if (unlikely(infilecopy == NULL))
fatal("Failed to allocate memory for infile suffix\n");
else {
strcpy(infilecopy, control->infile);
strcat(infilecopy, control->suffix);
}
} else
infilecopy = strdup(control->infile);
/* regardless, infilecopy has the input filename */
}
if (!STDOUT && !TEST_ONLY) {
/* if output name already set, use it */
if (control->outname) {
control->outfile = strdup(control->outname);
} else {
/* default output name from infilecopy
* test if outdir specified. If so, strip path from filename of
* infilecopy, then remove suffix.
*/
if (control->outdir && (tmp = strrchr(infilecopy, '/')))
tmpoutfile = strdup(tmp + 1);
else
tmpoutfile = strdup(infilecopy);
/* remove suffix to make outfile name */
if ((tmp = strrchr(tmpoutfile, '.')) && !strcmp(tmp, control->suffix))
*tmp='\0';
control->outfile = malloc((control->outdir == NULL? 0: strlen(control->outdir)) + strlen(tmpoutfile) + 1);
if (unlikely(!control->outfile))
fatal("Failed to allocate outfile name\n");
if (control->outdir) { /* prepend control->outdir */
strcpy(control->outfile, control->outdir);
strcat(control->outfile, tmpoutfile);
} else
strcpy(control->outfile, tmpoutfile);
free(tmpoutfile);
}
if (!STDOUT)
print_progress("Output filename is: %s\n", control->outfile);
}
if (STDIN) {
fd_in = open_tmpinfile(control);
read_tmpinmagic(control);
if (ENCRYPT)
failure("Cannot decompress encrypted file from STDIN\n");
expected_size = control->st_size;
open_tmpinbuf(control);
} else {
fd_in = open(infilecopy, O_RDONLY);
if (unlikely(fd_in == -1)) {
fatal("Failed to open %s\n", infilecopy);
}
}
control->fd_in = fd_in;
if (!(TEST_ONLY | STDOUT)) {
if (FORCE_REPLACE)
fd_out = open(control->outfile, O_WRONLY | O_CREAT | O_TRUNC, 0666);
else
fd_out = open(control->outfile, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (unlikely(fd_out == -1)) {
/* We must ensure we don't delete a file that already
* exists just because we tried to create a new one */
control->flags |= FLAG_KEEP_BROKEN;
fatal("Failed to create %s\n", control->outfile);
}
fd_hist = open(control->outfile, O_RDONLY);
if (unlikely(fd_hist == -1))
fatal("Failed to open history file %s\n", control->outfile);
preserve_perms(control, fd_in, fd_out);
} else {
fd_out = open_tmpoutfile(control);
if (unlikely(fd_out == -1))
fatal("Failed to create %s\n", control->outfile);
fd_hist = open(control->outfile, O_RDONLY);
if (unlikely(fd_hist == -1))
fatal("Failed to open history file %s\n", control->outfile);
/* Unlink temporary file as soon as possible */
if (unlikely(unlink(control->outfile)))
fatal("Failed to unlink tmpfile: %s\n", control->outfile);
}
open_tmpoutbuf(control);
if (!STDIN)
read_magic(control, fd_in, &expected_size);
if (!STDOUT) {
/* Check if there's enough free space on the device chosen to fit the
* decompressed file. */
if (unlikely(fstatvfs(fd_out, &fbuf)))
fatal("Failed to fstatvfs in decompress_file\n");
free_space = (i64)fbuf.f_bsize * (i64)fbuf.f_bavail;
if (free_space < expected_size) {
if (FORCE_REPLACE)
print_err("Warning, inadequate free space detected, but attempting to decompress due to -f option being used.\n");
else
failure("Inadequate free space to decompress file, use -f to override.\n");
}
}
control->fd_out = fd_out;
control->fd_hist = fd_hist;
if (NO_MD5)
print_verbose("Not performing MD5 hash check\n");
if (HAS_MD5)
print_verbose("MD5 ");
else
print_verbose("CRC32 ");
print_verbose("being used for integrity testing.\n");
if (ENCRYPT)
get_hash(control, 0);
print_progress("Decompressing...\n");
runzip_fd(control, fd_in, fd_out, fd_hist, expected_size);
if (STDOUT && !TMP_OUTBUF)
dump_tmpoutfile(control, fd_out);
/* if we get here, no fatal errors during decompression */
print_progress("\r");
if (!(STDOUT | TEST_ONLY))
print_output("Output filename is: %s: ", control->outfile);
if (!expected_size)
expected_size = control->st_size;
if (!ENCRYPT)
print_progress("[OK] - %lld bytes \n", expected_size);
else
print_progress("[OK] \n");
if (unlikely(close(fd_hist) || close(fd_out)))
fatal("Failed to close files\n");
close(fd_in);
if (!KEEP_FILES) {
if (unlikely(unlink(control->infile)))
fatal("Failed to unlink %s\n", infilecopy);
}
if (ENCRYPT)
release_hashes(control);
free(control->outfile);
free(infilecopy);
}
void get_header_info(rzip_control *control, int fd_in, uchar *ctype, i64 *c_len,
i64 *u_len, i64 *last_head, int chunk_bytes)
{
if (unlikely(read(fd_in, ctype, 1) != 1))
fatal("Failed to read in get_header_info\n");
*c_len = *u_len = *last_head = 0;
if (control->major_version == 0 && control->minor_version < 4) {
u32 c_len32, u_len32, last_head32;
if (unlikely(read(fd_in, &c_len32, 4) != 4))
fatal("Failed to read in get_header_info");
if (unlikely(read(fd_in, &u_len32, 4) != 4))
fatal("Failed to read in get_header_info");
if (unlikely(read(fd_in, &last_head32, 4) != 4))
fatal("Failed to read in get_header_info");
c_len32 = le32toh(c_len32);
u_len32 = le32toh(u_len32);
last_head32 = le32toh(last_head32);
*c_len = c_len32;
*u_len = u_len32;
*last_head = last_head32;
} else {
int read_len;
if (control->major_version == 0 && control->minor_version == 5)
read_len = 8;
else
read_len = chunk_bytes;
if (unlikely(read(fd_in, c_len, read_len) != read_len))
fatal("Failed to read in get_header_info");
if (unlikely(read(fd_in, u_len, read_len) != read_len))
fatal("Failed to read in get_header_info");
if (unlikely(read(fd_in, last_head, read_len) != read_len))
fatal("Failed to read_i64 in get_header_info");
c_len = le64toh(c_len);
u_len = le64toh(u_len);
last_head = le64toh(last_head);
}
}
void get_fileinfo(rzip_control *control)
{
i64 u_len, c_len, last_head, utotal = 0, ctotal = 0, ofs = 25, stream_head[2];
i64 expected_size, infile_size, chunk_size = 0, chunk_total = 0;
int header_length, stream = 0, chunk = 0;
char *tmp, *infilecopy = NULL;
int seekspot, fd_in;
char chunk_byte = 0;
long double cratio;
uchar ctype = 0;
struct stat st;
if (!STDIN) {
if ((tmp = strrchr(control->infile, '.')) && strcmp(tmp,control->suffix)) {
infilecopy = malloc(strlen(control->infile) + strlen(control->suffix) + 1);
if (unlikely(infilecopy == NULL))
fatal("Failed to allocate memory for infile suffix\n");
else {
strcpy(infilecopy, control->infile);
strcat(infilecopy, control->suffix);
}
} else
infilecopy = strdup(control->infile);
}
if (STDIN)
fd_in = 0;
else {
fd_in = open(infilecopy, O_RDONLY);
if (unlikely(fd_in == -1))
fatal("Failed to open %s\n", infilecopy);
}
/* Get file size */
if (unlikely(fstat(fd_in, &st)))
fatal("bad magic file descriptor!?\n");
memcpy(&infile_size, &st.st_size, 8);
/* Get decompressed size */
read_magic(control, fd_in, &expected_size);
if (ENCRYPT) {
print_output("Encrypted lrzip archive. No further information available\n");
goto out;
}
if (control->major_version == 0 && control->minor_version > 4) {
if (unlikely(read(fd_in, &chunk_byte, 1) != 1))
fatal("Failed to read chunk_byte in get_fileinfo\n");
if (control->major_version == 0 && control->minor_version > 5) {
if (unlikely(read(fd_in, &control->eof, 1) != 1))
fatal("Failed to read eof in get_fileinfo\n");
if (unlikely(read(fd_in, &chunk_size, chunk_byte) != chunk_byte))
fatal("Failed to read chunk_size in get_fileinfo\n");
chunk_size = le64toh(chunk_size);
}
}
if (control->major_version == 0 && control->minor_version < 4) {
ofs = 24;
header_length = 13;
} else if (control->major_version == 0 && control->minor_version == 4) {
ofs = 24;
header_length = 25;
} else if (control->major_version == 0 && control->minor_version == 5) {
ofs = 25;
header_length = 25;
} else {
ofs = 26 + chunk_byte;
header_length = 1 + (chunk_byte * 3);
}
next_chunk:
stream = 0;
stream_head[0] = 0;
stream_head[1] = stream_head[0] + header_length;
print_verbose("Rzip chunk %d:\n", ++chunk);
if (chunk_byte)
print_verbose("Chunk byte width: %d\n", chunk_byte);
if (chunk_size) {
chunk_total += chunk_size;
print_verbose("Chunk size: %lld\n", chunk_size);
}
while (stream < NUM_STREAMS) {
int block = 1;
if (unlikely(lseek(fd_in, stream_head[stream] + ofs, SEEK_SET)) == -1)
fatal("Failed to seek to header data in get_fileinfo\n");
get_header_info(control, fd_in, &ctype, &c_len, &u_len, &last_head, chunk_byte);
print_verbose("Stream: %d\n", stream);
print_maxverbose("Offset: %lld\n", ofs);
print_verbose("Block\tComp\tPercent\tSize\n");
do {
i64 head_off;
if (unlikely(last_head + ofs > infile_size))
failure("Offset greater than archive size, likely corrupted/truncated archive.\n");
if (unlikely(head_off = lseek(fd_in, last_head + ofs, SEEK_SET)) == -1)
fatal("Failed to seek to header data in get_fileinfo\n");
get_header_info(control, fd_in, &ctype, &c_len, &u_len,
&last_head, chunk_byte);
if (unlikely(last_head < 0 || c_len < 0 || u_len < 0))
failure("Entry negative, likely corrupted archive.\n");
print_verbose("%d\t", block);
if (ctype == CTYPE_NONE)
print_verbose("none");
else if (ctype == CTYPE_BZIP2)
print_verbose("bzip2");
else if (ctype == CTYPE_LZO)
print_verbose("lzo");
else if (ctype == CTYPE_LZMA)
print_verbose("lzma");
else if (ctype == CTYPE_GZIP)
print_verbose("gzip");
else if (ctype == CTYPE_ZPAQ)
print_verbose("zpaq");
else
print_verbose("Dunno wtf");
utotal += u_len;
ctotal += c_len;
print_verbose("\t%.1f%%\t%lld / %lld", (double)c_len / (double)(u_len / 100), c_len, u_len);
print_maxverbose("\tOffset: %lld\tHead: %lld", head_off, last_head);
print_verbose("\n");
block++;
} while (last_head);
++stream;
}
if (unlikely((ofs = lseek(fd_in, c_len, SEEK_CUR)) == -1))
fatal("Failed to lseek c_len in get_fileinfo\n");
if (ofs >= infile_size - (HAS_MD5 ? MD5_DIGEST_SIZE : 0))
goto done;
/* Chunk byte entry */
if (control->major_version == 0 && control->minor_version > 4) {
if (unlikely(read(fd_in, &chunk_byte, 1) != 1))
fatal("Failed to read chunk_byte in get_fileinfo\n");
ofs++;
if (control->major_version == 0 && control->minor_version > 5) {
if (unlikely(read(fd_in, &control->eof, 1) != 1))
fatal("Failed to read eof in get_fileinfo\n");
if (unlikely(read(fd_in, &chunk_size, chunk_byte) != chunk_byte))
fatal("Failed to read chunk_size in get_fileinfo\n");
chunk_size = le64toh(chunk_size);
ofs += 1 + chunk_byte;
header_length = 1 + (chunk_byte * 3);
}
}
goto next_chunk;
done:
if (unlikely(ofs > infile_size))
failure("Offset greater than archive size, likely corrupted/truncated archive.\n");
if (chunk_total > expected_size)
expected_size = chunk_total;
print_verbose("Rzip compression: %.1f%% %lld / %lld\n",
(double)utotal / (double)(expected_size / 100),
utotal, expected_size);
print_verbose("Back end compression: %.1f%% %lld / %lld\n",
(double)ctotal / (double)(utotal / 100),
ctotal, utotal);
print_verbose("Overall compression: %.1f%% %lld / %lld\n",
(double)ctotal / (double)(expected_size / 100),
ctotal, expected_size);
cratio = (long double)expected_size / (long double)infile_size;
print_output("%s:\nlrzip version: %d.%d file\n", infilecopy, control->major_version, control->minor_version);
print_output("Compression: ");
if (ctype == CTYPE_NONE)
print_output("rzip alone\n");
else if (ctype == CTYPE_BZIP2)
print_output("rzip + bzip2\n");
else if (ctype == CTYPE_LZO)
print_output("rzip + lzo\n");
else if (ctype == CTYPE_LZMA)
print_output("rzip + lzma\n");
else if (ctype == CTYPE_GZIP)
print_output("rzip + gzip\n");
else if (ctype == CTYPE_ZPAQ)
print_output("rzip + zpaq\n");
else
print_output("Dunno wtf\n");
print_output("Decompressed file size: %llu\n", expected_size);
print_output("Compressed file size: %llu\n", infile_size);
print_output("Compression ratio: %.3Lf\n", cratio);
if (HAS_MD5) {
char md5_stored[MD5_DIGEST_SIZE];
int i;
print_output("MD5 used for integrity testing\n");
if (unlikely(lseek(fd_in, -MD5_DIGEST_SIZE, SEEK_END)) == -1)
fatal("Failed to seek to md5 data in runzip_fd\n");
if (unlikely(read(fd_in, md5_stored, MD5_DIGEST_SIZE) != MD5_DIGEST_SIZE))
fatal("Failed to read md5 data in runzip_fd\n");
print_output("MD5: ");
for (i = 0; i < MD5_DIGEST_SIZE; i++)
print_output("%02x", md5_stored[i] & 0xFF);
print_output("\n");
} else
print_output("CRC32 used for integrity testing\n");
if (unlikely(close(fd_in)))
fatal("Failed to close fd_in in get_fileinfo\n");
out:
free(control->outfile);
free(infilecopy);
}
/*
compress one file from the command line
*/
void compress_file(rzip_control *control)
{
const char *tmp, *tmpinfile; /* we're just using this as a proxy for control->infile.
* Spares a compiler warning
*/
int fd_in, fd_out = -1;
char header[MAGIC_LEN];
if (ENCRYPT)
get_hash(control, 1);
memset(header, 0, sizeof(header));
if (!STDIN) {
/* is extension at end of infile? */
if ((tmp = strrchr(control->infile, '.')) && !strcmp(tmp, control->suffix)) {
print_err("%s: already has %s suffix. Skipping...\n", control->infile, control->suffix);
return;
}
fd_in = open(control->infile, O_RDONLY);
if (unlikely(fd_in == -1))
fatal("Failed to open %s\n", control->infile);
} else
fd_in = 0;
if (!STDOUT) {
if (control->outname) {
/* check if outname has control->suffix */
if (*(control->suffix) == '\0') /* suffix is empty string */
control->outfile = strdup(control->outname);
else if ((tmp=strrchr(control->outname, '.')) && strcmp(tmp, control->suffix)) {
control->outfile = malloc(strlen(control->outname) + strlen(control->suffix) + 1);
if (unlikely(!control->outfile))
fatal("Failed to allocate outfile name\n");
strcpy(control->outfile, control->outname);
strcat(control->outfile, control->suffix);
print_output("Suffix added to %s.\nFull pathname is: %s\n", control->outname, control->outfile);
} else /* no, already has suffix */
control->outfile = strdup(control->outname);
} else {
/* default output name from control->infile
* test if outdir specified. If so, strip path from filename of
* control->infile
*/
if (control->outdir && (tmp = strrchr(control->infile, '/')))
tmpinfile = tmp + 1;
else
tmpinfile = control->infile;
control->outfile = malloc((control->outdir == NULL? 0: strlen(control->outdir)) + strlen(tmpinfile) + strlen(control->suffix) + 1);
if (unlikely(!control->outfile))
fatal("Failed to allocate outfile name\n");
if (control->outdir) { /* prepend control->outdir */
strcpy(control->outfile, control->outdir);
strcat(control->outfile, tmpinfile);
} else
strcpy(control->outfile, tmpinfile);
strcat(control->outfile, control->suffix);
print_progress("Output filename is: %s\n", control->outfile);
}
if (FORCE_REPLACE)
fd_out = open(control->outfile, O_RDWR | O_CREAT | O_TRUNC, 0666);
else
fd_out = open(control->outfile, O_RDWR | O_CREAT | O_EXCL, 0666);
if (unlikely(fd_out == -1)) {
/* We must ensure we don't delete a file that already
* exists just because we tried to create a new one */
control->flags |= FLAG_KEEP_BROKEN;
fatal("Failed to create %s\n", control->outfile);
}
control->fd_out = fd_out;
preserve_perms(control, fd_in, fd_out);
} else
open_tmpoutbuf(control);
/* Write zeroes to header at beginning of file */
if (unlikely(!STDOUT && write(fd_out, header, sizeof(header)) != sizeof(header)))
fatal("Cannot write file header\n");
rzip_fd(control, fd_in, fd_out);
/* Wwrite magic at end b/c lzma does not tell us properties until it is done */
if (!STDOUT)
write_magic(control);
if (ENCRYPT)
release_hashes(control);
if (unlikely(close(fd_in)))
fatal("Failed to close fd_in\n");
if (unlikely(!STDOUT && close(fd_out)))
fatal("Failed to close fd_out\n");
if (TMP_OUTBUF)
close_tmpoutbuf(control);
if (!KEEP_FILES) {
if (unlikely(unlink(control->infile)))
fatal("Failed to unlink %s\n", control->infile);
}
free(control->outfile);
}
Reference in a new issue View git blame Copy permalink