427 lines
14 KiB
C++
427 lines
14 KiB
C++
/**
|
|
* Copyright (c) 2016-present, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*/
|
|
#include "Options.h"
|
|
#include "utils/ScopeGuard.h"
|
|
|
|
#include <algorithm>
|
|
#include <cassert>
|
|
#include <cstdio>
|
|
#include <cstring>
|
|
#include <iterator>
|
|
#include <thread>
|
|
#include <util.h>
|
|
#include <vector>
|
|
|
|
#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32) || \
|
|
defined(__CYGWIN__)
|
|
#include <io.h> /* _isatty */
|
|
#define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
|
|
#else
|
|
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
|
|
defined(_POSIX_SOURCE) || \
|
|
(defined(__APPLE__) && \
|
|
defined( \
|
|
__MACH__)) /* https://sourceforge.net/p/predef/wiki/OperatingSystems/ \
|
|
*/
|
|
#include <unistd.h> /* isatty */
|
|
#define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
|
|
#else
|
|
#define IS_CONSOLE(stdStream) 0
|
|
#endif
|
|
#endif
|
|
|
|
namespace pzstd {
|
|
|
|
namespace {
|
|
unsigned defaultNumThreads() {
|
|
#ifdef PZSTD_NUM_THREADS
|
|
return PZSTD_NUM_THREADS;
|
|
#else
|
|
return std::thread::hardware_concurrency();
|
|
#endif
|
|
}
|
|
|
|
unsigned parseUnsigned(const char **arg) {
|
|
unsigned result = 0;
|
|
while (**arg >= '0' && **arg <= '9') {
|
|
result *= 10;
|
|
result += **arg - '0';
|
|
++(*arg);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
const char *getArgument(const char *options, const char **argv, int &i,
|
|
int argc) {
|
|
if (options[1] != 0) {
|
|
return options + 1;
|
|
}
|
|
++i;
|
|
if (i == argc) {
|
|
std::fprintf(stderr, "Option -%c requires an argument, but none provided\n",
|
|
*options);
|
|
return nullptr;
|
|
}
|
|
return argv[i];
|
|
}
|
|
|
|
const std::string kZstdExtension = ".zst";
|
|
constexpr char kStdIn[] = "-";
|
|
constexpr char kStdOut[] = "-";
|
|
constexpr unsigned kDefaultCompressionLevel = 3;
|
|
constexpr unsigned kMaxNonUltraCompressionLevel = 19;
|
|
|
|
#ifdef _WIN32
|
|
const char nullOutput[] = "nul";
|
|
#else
|
|
const char nullOutput[] = "/dev/null";
|
|
#endif
|
|
|
|
void notSupported(const char *option) {
|
|
std::fprintf(stderr, "Operation not supported: %s\n", option);
|
|
}
|
|
|
|
void usage() {
|
|
std::fprintf(stderr, "Usage:\n");
|
|
std::fprintf(stderr, " pzstd [args] [FILE(s)]\n");
|
|
std::fprintf(stderr, "Parallel ZSTD options:\n");
|
|
std::fprintf(stderr, " -p, --processes # : number of threads to use for (de)compression (default:%d)\n", defaultNumThreads());
|
|
|
|
std::fprintf(stderr, "ZSTD options:\n");
|
|
std::fprintf(stderr, " -# : # compression level (1-%d, default:%d)\n", kMaxNonUltraCompressionLevel, kDefaultCompressionLevel);
|
|
std::fprintf(stderr, " -d, --decompress : decompression\n");
|
|
std::fprintf(stderr, " -o file : result stored into `file` (only if 1 input file)\n");
|
|
std::fprintf(stderr, " -f, --force : overwrite output without prompting\n");
|
|
std::fprintf(stderr, " --rm : remove source file(s) after successful (de)compression\n");
|
|
std::fprintf(stderr, " -k, --keep : preserve source file(s) (default)\n");
|
|
std::fprintf(stderr, " -h, --help : display help and exit\n");
|
|
std::fprintf(stderr, " -V, --version : display version number and exit\n");
|
|
std::fprintf(stderr, " -v, --verbose : verbose mode; specify multiple times to increase log level (default:2)\n");
|
|
std::fprintf(stderr, " -q, --quiet : suppress warnings; specify twice to suppress errors too\n");
|
|
std::fprintf(stderr, " -c, --stdout : force write to standard output, even if it is the console\n");
|
|
#ifdef UTIL_HAS_CREATEFILELIST
|
|
std::fprintf(stderr, " -r : operate recursively on directories\n");
|
|
#endif
|
|
std::fprintf(stderr, " --ultra : enable levels beyond %i, up to %i (requires more memory)\n", kMaxNonUltraCompressionLevel, ZSTD_maxCLevel());
|
|
std::fprintf(stderr, " -C, --check : integrity check (default)\n");
|
|
std::fprintf(stderr, " --no-check : no integrity check\n");
|
|
std::fprintf(stderr, " -t, --test : test compressed file integrity\n");
|
|
std::fprintf(stderr, " -- : all arguments after \"--\" are treated as files\n");
|
|
}
|
|
} // anonymous namespace
|
|
|
|
Options::Options()
|
|
: numThreads(defaultNumThreads()), maxWindowLog(23),
|
|
compressionLevel(kDefaultCompressionLevel), decompress(false),
|
|
overwrite(false), keepSource(true), writeMode(WriteMode::Auto),
|
|
checksum(true), verbosity(2) {}
|
|
|
|
Options::Status Options::parse(int argc, const char **argv) {
|
|
bool test = false;
|
|
bool recursive = false;
|
|
bool ultra = false;
|
|
bool forceStdout = false;
|
|
// Local copy of input files, which are pointers into argv.
|
|
std::vector<const char *> localInputFiles;
|
|
for (int i = 1; i < argc; ++i) {
|
|
const char *arg = argv[i];
|
|
// Protect against empty arguments
|
|
if (arg[0] == 0) {
|
|
continue;
|
|
}
|
|
// Everything after "--" is an input file
|
|
if (!std::strcmp(arg, "--")) {
|
|
++i;
|
|
std::copy(argv + i, argv + argc, std::back_inserter(localInputFiles));
|
|
break;
|
|
}
|
|
// Long arguments that don't have a short option
|
|
{
|
|
bool isLongOption = true;
|
|
if (!std::strcmp(arg, "--rm")) {
|
|
keepSource = false;
|
|
} else if (!std::strcmp(arg, "--ultra")) {
|
|
ultra = true;
|
|
maxWindowLog = 0;
|
|
} else if (!std::strcmp(arg, "--no-check")) {
|
|
checksum = false;
|
|
} else if (!std::strcmp(arg, "--sparse")) {
|
|
writeMode = WriteMode::Sparse;
|
|
notSupported("Sparse mode");
|
|
return Status::Failure;
|
|
} else if (!std::strcmp(arg, "--no-sparse")) {
|
|
writeMode = WriteMode::Regular;
|
|
notSupported("Sparse mode");
|
|
return Status::Failure;
|
|
} else if (!std::strcmp(arg, "--dictID")) {
|
|
notSupported(arg);
|
|
return Status::Failure;
|
|
} else if (!std::strcmp(arg, "--no-dictID")) {
|
|
notSupported(arg);
|
|
return Status::Failure;
|
|
} else {
|
|
isLongOption = false;
|
|
}
|
|
if (isLongOption) {
|
|
continue;
|
|
}
|
|
}
|
|
// Arguments with a short option simply set their short option.
|
|
const char *options = nullptr;
|
|
if (!std::strcmp(arg, "--processes")) {
|
|
options = "p";
|
|
} else if (!std::strcmp(arg, "--version")) {
|
|
options = "V";
|
|
} else if (!std::strcmp(arg, "--help")) {
|
|
options = "h";
|
|
} else if (!std::strcmp(arg, "--decompress")) {
|
|
options = "d";
|
|
} else if (!std::strcmp(arg, "--force")) {
|
|
options = "f";
|
|
} else if (!std::strcmp(arg, "--stdout")) {
|
|
options = "c";
|
|
} else if (!std::strcmp(arg, "--keep")) {
|
|
options = "k";
|
|
} else if (!std::strcmp(arg, "--verbose")) {
|
|
options = "v";
|
|
} else if (!std::strcmp(arg, "--quiet")) {
|
|
options = "q";
|
|
} else if (!std::strcmp(arg, "--check")) {
|
|
options = "C";
|
|
} else if (!std::strcmp(arg, "--test")) {
|
|
options = "t";
|
|
} else if (arg[0] == '-' && arg[1] != 0) {
|
|
options = arg + 1;
|
|
} else {
|
|
localInputFiles.emplace_back(arg);
|
|
continue;
|
|
}
|
|
assert(options != nullptr);
|
|
|
|
bool finished = false;
|
|
while (!finished && *options != 0) {
|
|
// Parse the compression level
|
|
if (*options >= '0' && *options <= '9') {
|
|
compressionLevel = parseUnsigned(&options);
|
|
continue;
|
|
}
|
|
|
|
switch (*options) {
|
|
case 'h':
|
|
case 'H':
|
|
usage();
|
|
return Status::Message;
|
|
case 'V':
|
|
std::fprintf(stderr, "PZSTD version: %s.\n", ZSTD_VERSION_STRING);
|
|
return Status::Message;
|
|
case 'p': {
|
|
finished = true;
|
|
const char *optionArgument = getArgument(options, argv, i, argc);
|
|
if (optionArgument == nullptr) {
|
|
return Status::Failure;
|
|
}
|
|
if (*optionArgument < '0' || *optionArgument > '9') {
|
|
std::fprintf(stderr, "Option -p expects a number, but %s provided\n",
|
|
optionArgument);
|
|
return Status::Failure;
|
|
}
|
|
numThreads = parseUnsigned(&optionArgument);
|
|
if (*optionArgument != 0) {
|
|
std::fprintf(stderr,
|
|
"Option -p expects a number, but %u%s provided\n",
|
|
numThreads, optionArgument);
|
|
return Status::Failure;
|
|
}
|
|
break;
|
|
}
|
|
case 'o': {
|
|
finished = true;
|
|
const char *optionArgument = getArgument(options, argv, i, argc);
|
|
if (optionArgument == nullptr) {
|
|
return Status::Failure;
|
|
}
|
|
outputFile = optionArgument;
|
|
break;
|
|
}
|
|
case 'C':
|
|
checksum = true;
|
|
break;
|
|
case 'k':
|
|
keepSource = true;
|
|
break;
|
|
case 'd':
|
|
decompress = true;
|
|
break;
|
|
case 'f':
|
|
overwrite = true;
|
|
forceStdout = true;
|
|
break;
|
|
case 't':
|
|
test = true;
|
|
decompress = true;
|
|
break;
|
|
#ifdef UTIL_HAS_CREATEFILELIST
|
|
case 'r':
|
|
recursive = true;
|
|
break;
|
|
#endif
|
|
case 'c':
|
|
outputFile = kStdOut;
|
|
forceStdout = true;
|
|
break;
|
|
case 'v':
|
|
++verbosity;
|
|
break;
|
|
case 'q':
|
|
--verbosity;
|
|
// Ignore them for now
|
|
break;
|
|
// Unsupported options from Zstd
|
|
case 'D':
|
|
case 's':
|
|
notSupported("Zstd dictionaries.");
|
|
return Status::Failure;
|
|
case 'b':
|
|
case 'e':
|
|
case 'i':
|
|
case 'B':
|
|
notSupported("Zstd benchmarking options.");
|
|
return Status::Failure;
|
|
default:
|
|
std::fprintf(stderr, "Invalid argument: %s\n", arg);
|
|
return Status::Failure;
|
|
}
|
|
if (!finished) {
|
|
++options;
|
|
}
|
|
} // while (*options != 0);
|
|
} // for (int i = 1; i < argc; ++i);
|
|
|
|
// Input file defaults to standard input if not provided.
|
|
if (localInputFiles.empty()) {
|
|
localInputFiles.emplace_back(kStdIn);
|
|
}
|
|
|
|
// Check validity of input files
|
|
if (localInputFiles.size() > 1) {
|
|
const auto it = std::find(localInputFiles.begin(), localInputFiles.end(),
|
|
std::string{kStdIn});
|
|
if (it != localInputFiles.end()) {
|
|
std::fprintf(
|
|
stderr,
|
|
"Cannot specify standard input when handling multiple files\n");
|
|
return Status::Failure;
|
|
}
|
|
}
|
|
if (localInputFiles.size() > 1 || recursive) {
|
|
if (!outputFile.empty() && outputFile != nullOutput) {
|
|
std::fprintf(
|
|
stderr,
|
|
"Cannot specify an output file when handling multiple inputs\n");
|
|
return Status::Failure;
|
|
}
|
|
}
|
|
|
|
// Translate input files/directories into files to (de)compress
|
|
if (recursive) {
|
|
char *scratchBuffer = nullptr;
|
|
unsigned numFiles = 0;
|
|
const char **files =
|
|
UTIL_createFileList(localInputFiles.data(), localInputFiles.size(),
|
|
&scratchBuffer, &numFiles);
|
|
if (files == nullptr) {
|
|
std::fprintf(stderr, "Error traversing directories\n");
|
|
return Status::Failure;
|
|
}
|
|
auto guard =
|
|
makeScopeGuard([&] { UTIL_freeFileList(files, scratchBuffer); });
|
|
if (numFiles == 0) {
|
|
std::fprintf(stderr, "No files found\n");
|
|
return Status::Failure;
|
|
}
|
|
inputFiles.resize(numFiles);
|
|
std::copy(files, files + numFiles, inputFiles.begin());
|
|
} else {
|
|
inputFiles.resize(localInputFiles.size());
|
|
std::copy(localInputFiles.begin(), localInputFiles.end(),
|
|
inputFiles.begin());
|
|
}
|
|
localInputFiles.clear();
|
|
assert(!inputFiles.empty());
|
|
|
|
// If reading from standard input, default to standard output
|
|
if (inputFiles[0] == kStdIn && outputFile.empty()) {
|
|
assert(inputFiles.size() == 1);
|
|
outputFile = "-";
|
|
}
|
|
|
|
if (inputFiles[0] == kStdIn && IS_CONSOLE(stdin)) {
|
|
assert(inputFiles.size() == 1);
|
|
std::fprintf(stderr, "Cannot read input from interactive console\n");
|
|
return Status::Failure;
|
|
}
|
|
if (outputFile == "-" && IS_CONSOLE(stdout) && !(forceStdout && decompress)) {
|
|
std::fprintf(stderr, "Will not write to console stdout unless -c or -f is "
|
|
"specified and decompressing\n");
|
|
return Status::Failure;
|
|
}
|
|
|
|
// Check compression level
|
|
{
|
|
unsigned maxCLevel =
|
|
ultra ? ZSTD_maxCLevel() : kMaxNonUltraCompressionLevel;
|
|
if (compressionLevel > maxCLevel || compressionLevel == 0) {
|
|
std::fprintf(stderr, "Invalid compression level %u.\n", compressionLevel);
|
|
return Status::Failure;
|
|
}
|
|
}
|
|
|
|
// Check that numThreads is set
|
|
if (numThreads == 0) {
|
|
std::fprintf(stderr, "Invalid arguments: # of threads not specified "
|
|
"and unable to determine hardware concurrency.\n");
|
|
return Status::Failure;
|
|
}
|
|
|
|
// Modify verbosity
|
|
// If we are piping input and output, turn off interaction
|
|
if (inputFiles[0] == kStdIn && outputFile == kStdOut && verbosity == 2) {
|
|
verbosity = 1;
|
|
}
|
|
// If we are in multi-file mode, turn off interaction
|
|
if (inputFiles.size() > 1 && verbosity == 2) {
|
|
verbosity = 1;
|
|
}
|
|
|
|
// Set options for test mode
|
|
if (test) {
|
|
outputFile = nullOutput;
|
|
keepSource = true;
|
|
}
|
|
return Status::Success;
|
|
}
|
|
|
|
std::string Options::getOutputFile(const std::string &inputFile) const {
|
|
if (!outputFile.empty()) {
|
|
return outputFile;
|
|
}
|
|
// Attempt to add/remove zstd extension from the input file
|
|
if (decompress) {
|
|
int stemSize = inputFile.size() - kZstdExtension.size();
|
|
if (stemSize > 0 && inputFile.substr(stemSize) == kZstdExtension) {
|
|
return inputFile.substr(0, stemSize);
|
|
} else {
|
|
return "";
|
|
}
|
|
} else {
|
|
return inputFile + kZstdExtension;
|
|
}
|
|
}
|
|
}
|