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lrzip.c
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/*
Copyright (C) 2006-2016,2018,2021-2022 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>
#ifdef HAVE_ENDIAN_H
# include <endian.h>
#elif HAVE_SYS_ENDIAN_H
# include <sys/endian.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#include <math.h>
#include <utime.h>
#include <inttypes.h>
#include "md5.h"
#include "rzip.h"
#include "runzip.h"
#include "util.h"
#include "stream.h"
#define MAGIC_LEN (24)
static void release_hashes(rzip_control *control);
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);
}
#ifdef __APPLE__
# include <sys/sysctl.h>
i64 get_ram(rzip_control *control)
{
int mib[2];
size_t len;
i64 *p, ramsize;
mib[0] = CTL_HW;
mib[1] = HW_MEMSIZE;
sysctl(mib, 2, NULL, &len, NULL, 0);
p = malloc(len);
sysctl(mib, 2, p, &len, NULL, 0);
ramsize = *p;
return ramsize;
}
#else /* __APPLE__ */
i64 get_ram(rzip_control *control)
{
i64 ramsize;
FILE *meminfo;
char aux[256];
ramsize = (i64)sysconf(_SC_PHYS_PAGES) * PAGE_SIZE;
if (ramsize > 0)
return ramsize;
/* Workaround for uclibc which doesn't properly support sysconf */
if(!(meminfo = fopen("/proc/meminfo", "r")))
fatal_return(("fopen\n"), -1);
while(!feof(meminfo) && !fscanf(meminfo, "MemTotal: %"PRId64" kB", &ramsize)) {
if (unlikely(fgets(aux, sizeof(aux), meminfo) == NULL)) {
fclose(meminfo);
fatal_return(("Failed to fgets in get_ram\n"), -1);
}
}
if (fclose(meminfo) == -1)
fatal_return(("fclose"), -1);
ramsize *= 1000;
return ramsize;
}
#endif
i64 nloops(i64 seconds, uchar *b1, uchar *b2)
{
i64 nloops;
int nbits;
nloops = ARBITRARY_AT_EPOCH * pow(MOORE_TIMES_PER_SECOND, seconds);
if (nloops < ARBITRARY)
nloops = ARBITRARY;
for (nbits = 0; nloops > 255; nbits ++)
nloops = nloops >> 1;
*b1 = nbits;
*b2 = nloops;
return nloops << nbits;
}
bool write_magic(rzip_control *control)
{
char magic[MAGIC_LEN] = {
'L', 'R', 'Z', 'I', LRZIP_MAJOR_VERSION, 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.
*/
if (!NO_MD5)
magic[21] = 1;
if (ENCRYPT)
magic[22] = 1;
if (unlikely(fdout_seekto(control, 0)))
fatal_return(("Failed to seek to BOF to write Magic Header\n"), false);
if (unlikely(put_fdout(control, magic, MAGIC_LEN) != MAGIC_LEN))
fatal_return(("Failed to write magic header\n"), false);
control->magic_written = 1;
return true;
}
static inline i64 enc_loops(uchar b1, uchar b2)
{
return (i64)b2 << (i64)b1;
}
static bool get_magic(rzip_control *control, char *magic)
{
int encrypted, md5, i;
i64 expected_size;
uint32_t v;
if (unlikely(strncmp(magic, "LRZI", 4)))
failure_return(("Not an lrzip file\n"), false);
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;
if (control->major_version == 0 && control->minor_version < 6)
control->eof = 1;
/* restore LZMA compression flags only if stored */
if ((int) magic[16]) {
for (i = 0; i < 5; i++)
control->lzma_properties[i] = magic[i + 16];
/* Cludge to allow us to read possibly corrupted archives */
if (!control->lzma_properties[0])
control->lzma_properties[0] = 93;
}
/* 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_return(("Unknown encryption\n"), false);
/* 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;
}
return true;
}
bool 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_return(("Failed to read magic header\n"), false);
if (unlikely(!get_magic(control, magic)))
return false;
*expected_size = control->st_size;
return true;
}
/* preserve ownership and permissions where possible */
static bool preserve_perms(rzip_control *control, int fd_in, int fd_out)
{
struct stat st;
if (unlikely(fstat(fd_in, &st)))
fatal_return(("Failed to fstat input file\n"), false);
if (unlikely(fchmod(fd_out, (st.st_mode & 0666))))
print_verbose("Warning, unable to set permissions on %s\n", control->outfile);
/* chown fail is not fatal_return(( */
if (unlikely(fchown(fd_out, st.st_uid, st.st_gid)))
print_verbose("Warning, unable to set owner on %s\n", control->outfile);
return true;
}
static bool preserve_times(rzip_control *control, int fd_in)
{
struct utimbuf times;
struct stat st;
if (unlikely(fstat(fd_in, &st)))
fatal_return(("Failed to fstat input file\n"), false);
times.actime = 0;
times.modtime = st.st_mtime;
if (unlikely(utime(control->outfile, ×)))
print_verbose("Warning, unable to set time on %s\n", control->outfile);
return true;
}
/* 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_return(("Failed to allocate outfile name\n"), -1);
strcpy(control->outfile, control->tmpdir);
strcat(control->outfile, "lrzipout.XXXXXX");
}
fd_out = mkstemp(control->outfile);
if (fd_out == -1) {
print_output("WARNING: Failed to create out tmpfile: %s, will fail if cannot perform %scompression entirely in ram\n",
control->outfile, DECOMPRESS ? "de" : "");
} else
register_outfile(control, control->outfile, TEST_ONLY || STDOUT || !KEEP_BROKEN);
print_maxverbose("Created temporary outfile %s\n", control->outfile);
return fd_out;
}
static bool fwrite_stdout(rzip_control *control, void *buf, i64 len)
{
uchar *offset_buf = buf;
ssize_t ret;
i64 total;
total = 0;
while (len > 0) {
ssize_t wrote;
if (BITS32)
ret = MIN(len, one_g);
else
ret = len;
wrote = fwrite(offset_buf, 1, ret, control->outFILE);
if (unlikely(wrote != ret))
fatal_return(("Failed to fwrite in fwrite_stdout\n"), false);
len -= ret;
offset_buf += ret;
total += ret;
}
fflush(control->outFILE);
return true;
}
bool write_fdout(rzip_control *control, void *buf, i64 len)
{
uchar *offset_buf = buf;
ssize_t ret;
while (len > 0) {
if (BITS32)
ret = MIN(len, one_g);
else
ret = len;
ret = write(control->fd_out, offset_buf, (size_t)ret);
if (unlikely(ret <= 0))
fatal_return(("Failed to write to fd_out in write_fdout\n"), false);
len -= ret;
offset_buf += ret;
}
return true;
}
static bool flush_tmpoutbuf(rzip_control *control)
{
if (!TEST_ONLY) {
print_maxverbose("Dumping buffer to physical file.\n");
if (STDOUT) {
if (unlikely(!fwrite_stdout(control, control->tmp_outbuf, control->out_len)))
return false;
} else {
if (unlikely(!write_fdout(control, control->tmp_outbuf, control->out_len)))
return false;
}
}
control->out_relofs += control->out_len;
control->out_ofs = control->out_len = 0;
return true;
}
/* Dump temporary outputfile to perform stdout */
static bool dump_tmpoutfile(rzip_control *control)
{
int tmpchar, fd_out = control->fd_out;
FILE *tmpoutfp;
if (unlikely(fd_out == -1))
fatal_return(("Failed: No temporary outfile created, unable to do in ram\n"), false);
/* flush anything not yet in the temporary file */
fsync(fd_out);
tmpoutfp = fdopen(fd_out, "r");
if (unlikely(tmpoutfp == NULL))
fatal_return(("Failed to fdopen out tmpfile\n"), false);
rewind(tmpoutfp);
if (!TEST_ONLY) {
print_verbose("Dumping temporary file to control->outFILE.\n");
while ((tmpchar = fgetc(tmpoutfp)) != EOF)
putchar(tmpchar);
fflush(control->outFILE);
rewind(tmpoutfp);
}
if (unlikely(ftruncate(fd_out, 0)))
fatal_return(("Failed to ftruncate fd_out in dump_tmpoutfile\n"), false);
return true;
}
bool flush_tmpout(rzip_control *control)
{
if (!STDOUT)
return true;
if (TMP_OUTBUF)
return flush_tmpoutbuf(control);
return dump_tmpoutfile(control);
}
/* Used if we're unable to read STDIN into the temporary buffer, shunts data
* to temporary file */
bool write_fdin(rzip_control *control)
{
uchar *offset_buf = control->tmp_inbuf;
i64 len = control->in_len;
ssize_t ret;
while (len > 0) {
if (BITS32)
ret = MIN(len, one_g);
else
ret = len;
ret = write(control->fd_in, offset_buf, (size_t)ret);
if (unlikely(ret <= 0))
fatal_return(("Failed to write to fd_in in write_fdin\n"), false);
len -= ret;
offset_buf += ret;
}
return true;
}
/* Open a temporary inputfile to perform stdin decompression */
int open_tmpinfile(rzip_control *control)
{
int fd_in = -1;
/* Use temporary directory if there is one */
if (control->tmpdir) {
control->infile = malloc(strlen(control->tmpdir) + 15);
if (unlikely(!control->infile))
fatal_return(("Failed to allocate infile name\n"), -1);
strcpy(control->infile, control->tmpdir);
strcat(control->infile, "lrzipin.XXXXXX");
fd_in = mkstemp(control->infile);
}
/* Try the current directory */
if (fd_in == -1) {
dealloc(control->infile);
control->infile = malloc(16);
if (unlikely(!control->infile))
fatal_return(("Failed to allocate infile name\n"), -1);
strcpy(control->infile, "lrzipin.XXXXXX");
fd_in = mkstemp(control->infile);
}
/* Use /tmp if nothing is writeable so far */
if (fd_in == -1) {
dealloc(control->infile);
control->infile = malloc(20);
if (unlikely(!control->infile))
fatal_return(("Failed to allocate infile name\n"), -1);
strcpy(control->infile, "/tmp/lrzipin.XXXXXX");
fd_in = mkstemp(control->infile);
}
if (fd_in == -1) {
print_output("WARNING: Failed to create in tmpfile: %s, will fail if cannot perform %scompression entirely in ram\n",
control->infile, DECOMPRESS ? "de" : "");
} else {
register_infile(control, control->infile, (DECOMPRESS || TEST_ONLY) && STDIN);
/* Unlink temporary file immediately to minimise chance of files left
* lying around in cases of failure_return((. */
if (unlikely(unlink(control->infile))) {
fatal("Failed to unlink tmpfile: %s\n", control->infile);
close(fd_in);
return -1;
}
}
return fd_in;
}
static bool 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_return(("Reached end of file on STDIN prematurely on v05 magic read\n"), false);
magic[i] = (char)tmpchar;
}
return get_magic(control, magic);
}
/* Read data from stdin into temporary inputfile */
bool read_tmpinfile(rzip_control *control, int fd_in)
{
FILE *tmpinfp;
int tmpchar;
if (fd_in == -1)
return false;
if (control->flags & FLAG_SHOW_PROGRESS)
fprintf(control->msgout, "Copying from stdin.\n");
tmpinfp = fdopen(fd_in, "w+");
if (unlikely(tmpinfp == NULL))
fatal_return(("Failed to fdopen in tmpfile\n"), false);
while ((tmpchar = getchar()) != EOF)
fputc(tmpchar, tmpinfp);
fflush(tmpinfp);
rewind(tmpinfp);
return true;
}
/* To perform STDOUT, we allocate a proportion of ram that is then used as
* a pseudo-temporary file */
static bool open_tmpoutbuf(rzip_control *control)
{
i64 maxlen = control->maxram;
void *buf;
while (42) {
round_to_page(&maxlen);
buf = malloc(maxlen);
if (buf) {
print_maxverbose("Malloced %"PRId64" for tmp_outbuf\n", maxlen);
break;
}
maxlen = maxlen / 3 * 2;
if (maxlen < 100000000)
fatal_return(("Unable to even malloc 100MB for tmp_outbuf\n"), false);
}
control->flags |= FLAG_TMP_OUTBUF;
/* Allocate slightly more so we can cope when the buffer overflows and
* fall back to a real temporary file */
control->out_maxlen = maxlen - control->page_size;
control->tmp_outbuf = buf;
if (!DECOMPRESS && !TEST_ONLY)
control->out_ofs = control->out_len = MAGIC_LEN;\
return true;
}
/* We've decided to use a temporary output file instead of trying to store
* all the output buffer in ram so we can free up the ram and increase the
* maximum sizes of ram we can allocate */
void close_tmpoutbuf(rzip_control *control)
{
control->flags &= ~FLAG_TMP_OUTBUF;
dealloc(control->tmp_outbuf);
if (!BITS32)
control->usable_ram = control->maxram += control->ramsize / 18;
}
static bool 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_return(("Failed to malloc tmp_inbuf in open_tmpinbuf\n"), false);
return true;
}
void clear_tmpinbuf(rzip_control *control)
{
control->in_len = control->in_ofs = 0;
}
bool clear_tmpinfile(rzip_control *control)
{
if (unlikely(lseek(control->fd_in, 0, SEEK_SET)))
fatal_return(("Failed to lseek on fd_in in clear_tmpinfile\n"), false);
if (unlikely(ftruncate(control->fd_in, 0)))
fatal_return(("Failed to truncate fd_in in clear_tmpinfile\n"), false);
return true;
}
/* As per temporary output file but for input file */
void close_tmpinbuf(rzip_control *control)
{
control->flags &= ~FLAG_TMP_INBUF;
dealloc(control->tmp_inbuf);
if (!BITS32)
control->usable_ram = control->maxram += control->ramsize / 18;
}
static int get_pass(rzip_control *control, char *s)
{
int len;
memset(s, 0, PASS_LEN - SALT_LEN);
if (control->passphrase)
strncpy(s, control->passphrase, PASS_LEN - SALT_LEN - 1);
else if (unlikely(fgets(s, PASS_LEN - SALT_LEN, stdin) == NULL))
failure_return(("Failed to retrieve passphrase\n"), -1);
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_return(("Empty passphrase\n"), -1);
return len;
}
static bool get_hash(rzip_control *control, int make_hash)
{
char *passphrase, *testphrase;
struct termios termios_p;
int prompt = control->passphrase == NULL;
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");
dealloc(testphrase);
dealloc(passphrase);
return false;
}
mlock(passphrase, PASS_LEN);
mlock(testphrase, PASS_LEN);
mlock(control->salt_pass, PASS_LEN);
mlock(control->hash, HASH_LEN);
if (control->pass_cb) {
control->pass_cb(control->pass_data, passphrase, PASS_LEN - SALT_LEN);
if (!passphrase[0]) {
fatal("Supplied password was null!");
munlock(passphrase, PASS_LEN);
munlock(testphrase, PASS_LEN);
dealloc(testphrase);
dealloc(passphrase);
release_hashes(control);
return false;
}
control->salt_pass_len = strlen(passphrase) + SALT_LEN;
} else {
/* Disable stdin echo to screen */
tcgetattr(fileno(stdin), &termios_p);
termios_p.c_lflag &= ~ECHO;
tcsetattr(fileno(stdin), 0, &termios_p);
retry_pass:
if (prompt)
print_output("Enter passphrase: ");
control->salt_pass_len = get_pass(control, passphrase) + SALT_LEN;
if (prompt)
print_output("\n");
if (make_hash) {
if (prompt)
print_output("Re-enter passphrase: ");
get_pass(control, testphrase);
if (prompt)
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);
}
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);
munlock(testphrase, PASS_LEN);
dealloc(testphrase);
dealloc(passphrase);
return true;
}
static void release_hashes(rzip_control *control)
{
memset(control->salt_pass, 0, PASS_LEN);
memset(control->hash, 0, SALT_LEN);
munlock(control->salt_pass, PASS_LEN);
munlock(control->hash, HASH_LEN);
dealloc(control->salt_pass);
dealloc(control->hash);
}
static void clear_rulist(rzip_control *control)
{
while (control->ruhead) {
struct runzip_node *node = control->ruhead;
struct stream_info *sinfo = node->sinfo;
dealloc(sinfo->ucthreads);
dealloc(node->pthreads);
dealloc(sinfo->s);
dealloc(sinfo);
control->ruhead = node->prev;
dealloc(node);
}
}
/*
decompress one file from the command line
*/
bool decompress_file(rzip_control *control)
{
char *tmp, *tmpoutfile, *infilecopy = NULL;
int fd_in, fd_out = -1, fd_hist = -1;
i64 expected_size = 0, free_space;
struct statvfs fbuf;
if (!STDIN && !IS_FROM_FILE) {
struct stat fdin_stat;
stat(control->infile, &fdin_stat);
if (!S_ISREG(fdin_stat.st_mode) && (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 = alloca(strlen(control->infile) + strlen(control->suffix) + 1);
strcpy(infilecopy, control->infile);
strcat(infilecopy, control->suffix);
} else
infilecopy = strdupa(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 = strdupa(tmp + 1);
else
tmpoutfile = strdupa(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_return(("Failed to allocate outfile name\n"), false);
if (control->outdir) { /* prepend control->outdir */
strcpy(control->outfile, control->outdir);
strcat(control->outfile, tmpoutfile);
} else
strcpy(control->outfile, tmpoutfile);
}
if (!STDOUT)
print_output("Output filename is: %s\n", control->outfile);
}
if ( IS_FROM_FILE ) {
fd_in = fileno(control->inFILE);
}
else if (STDIN) {
fd_in = open_tmpinfile(control);
read_tmpinmagic(control);
if (ENCRYPT)
failure_return(("Cannot decompress encrypted file from STDIN\n"), false);
expected_size = control->st_size;
if (unlikely(!open_tmpinbuf(control)))
return false;
} else {
fd_in = open(infilecopy, O_RDONLY);
if (unlikely(fd_in == -1)) {
fatal_return(("Failed to open %s\n", infilecopy), false);
}
}
control->fd_in = fd_in;
if (!(TEST_ONLY | STDOUT)) {
fd_out = open(control->outfile, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (FORCE_REPLACE && (-1 == fd_out) && (EEXIST == errno)) {
if (unlikely(unlink(control->outfile)))
fatal_return(("Failed to unlink an existing file: %s\n", control->outfile), false);
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_return(("Failed to create %s\n", control->outfile), false);
}
fd_hist = open(control->outfile, O_RDONLY);
if (unlikely(fd_hist == -1))
fatal_return(("Failed to open history file %s\n", control->outfile), false);
/* Can't copy permissions from STDIN */
if (!STDIN)
if (unlikely(!preserve_perms(control, fd_in, fd_out)))
return false;
} else {
fd_out = open_tmpoutfile(control);
if (fd_out == -1) {
fd_hist = -1;
} else {
fd_hist = open(control->outfile, O_RDONLY);
if (unlikely(fd_hist == -1))
fatal_return(("Failed to open history file %s\n", control->outfile), false);
/* Unlink temporary file as soon as possible */
if (unlikely(unlink(control->outfile)))
fatal_return(("Failed to unlink tmpfile: %s\n", control->outfile), false);
}
}
if (STDOUT) {
if (unlikely(!open_tmpoutbuf(control)))
return false;
}
if (!STDIN) {
if (unlikely(!read_magic(control, fd_in, &expected_size)))
return false;
if (unlikely(expected_size < 0))
fatal_return(("Invalid expected size %lld\n", expected_size), false);
}
if (!STDOUT && !TEST_ONLY) {
/* Check if there's enough free space on the device chosen to fit the
* decompressed file. */
if (unlikely(fstatvfs(fd_out, &fbuf)))
fatal_return(("Failed to fstatvfs in decompress_file\n"), false);
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_return(("Inadequate free space to decompress file, use -f to override.\n"), false);
}
}
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)
if (unlikely(!get_hash(control, 0)))
return false;
print_output("Decompressing...\n");
if (unlikely(runzip_fd(control, fd_in, fd_hist, expected_size) < 0)) {
clear_rulist(control);
return false;
}
/* We can now safely delete sinfo and pthread data of all threads
* created. */
clear_rulist(control);
/* if we get here, no fatal_return(( 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_output("[OK] - %lld bytes \n", expected_size);
else
print_output("[OK] \n");
if (TMP_OUTBUF)
close_tmpoutbuf(control);
if (fd_out > 0) {
if (unlikely(close(fd_hist) || close(fd_out)))
fatal_return(("Failed to close files\n"), false);
}
if (unlikely(!STDIN && !STDOUT && !TEST_ONLY && !preserve_times(control, fd_in)))
return false;
if ( ! IS_FROM_FILE ) {
close(fd_in);
}
if (!KEEP_FILES && !STDIN) {
if (unlikely(unlink(control->infile)))
fatal_return(("Failed to unlink %s\n", infilecopy), false);
}
if (ENCRYPT)
release_hashes(control);
dealloc(control->outfile);
return true;
}
bool 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_return(("Failed to read in get_header_info\n"), false);
*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_return(("Failed to read in get_header_info"), false);
if (unlikely(read(fd_in, &u_len32, 4) != 4))
fatal_return(("Failed to read in get_header_info"), false);
if (unlikely(read(fd_in, &last_head32, 4) != 4))
fatal_return(("Failed to read in get_header_info"), false);
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_return(("Failed to read in get_header_info"), false);
if (unlikely(read(fd_in, u_len, read_len) != read_len))
fatal_return(("Failed to read in get_header_info"), false);
if (unlikely(read(fd_in, last_head, read_len) != read_len))
fatal_return(("Failed to read_i64 in get_header_info"), false);
*c_len = le64toh(*c_len);
*u_len = le64toh(*u_len);
*last_head = le64toh(*last_head);
}
return true;
}
static double percentage(i64 num, i64 den)
{
double d_num, d_den;
if (den < 100) {
d_num = num * 100;
d_den = den;
if (!d_den)
d_den = 1;
} else {
d_num = num;
d_den = den / 100;
}
return d_num / d_den;
}
bool get_fileinfo(rzip_control *control)
{
i64 u_len, c_len, second_last, 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;
char chunk_byte = 0;
long double cratio;
uchar ctype = 0;
uchar save_ctype = 255;
struct stat st;
int fd_in;
if (!STDIN) {
struct stat fdin_stat;
stat(control->infile, &fdin_stat);
if (!S_ISREG(fdin_stat.st_mode) && (tmp = strrchr(control->infile, '.')) &&
strcmp(tmp,control->suffix)) {
infilecopy = alloca(strlen(control->infile) + strlen(control->suffix) + 1);