573 lines
24 KiB
C
573 lines
24 KiB
C
/*
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LZ4cli - LZ4 Command Line Interface
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Copyright (C) Yann Collet 2011-2015
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GPL v2 License
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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You can contact the author at :
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- LZ4 source repository : https://github.com/lz4/lz4
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- LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
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*/
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/*
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Note : this is stand-alone program.
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It is not part of LZ4 compression library, it is a user program of the LZ4 library.
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The license of LZ4 library is BSD.
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The license of xxHash library is BSD.
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The license of this compression CLI program is GPLv2.
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*/
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/**************************************
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* Tuning parameters
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***************************************/
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/* ENABLE_LZ4C_LEGACY_OPTIONS :
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Control the availability of -c0, -c1 and -hc legacy arguments
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Default : Legacy options are disabled */
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/* #define ENABLE_LZ4C_LEGACY_OPTIONS */
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/**************************************
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* Compiler Options
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***************************************/
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/* Disable some Visual warning messages */
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#ifdef _MSC_VER
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# define _CRT_SECURE_NO_WARNINGS
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# define _CRT_SECURE_NO_DEPRECATE /* VS2005 */
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# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
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#endif
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/* cf. http://man7.org/linux/man-pages/man7/feature_test_macros.7.html */
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#define _XOPEN_VERSION 600 /* POSIX.2001, for fileno() within <stdio.h> on unix */
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/****************************
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* Includes
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*****************************/
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#include <stdio.h> /* fprintf, getchar */
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#include <stdlib.h> /* exit, calloc, free */
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#include <string.h> /* strcmp, strlen */
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#include "bench.h" /* BMK_benchFile, BMK_SetNbIterations, BMK_SetBlocksize, BMK_SetPause */
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#include "lz4io.h" /* LZ4IO_compressFilename, LZ4IO_decompressFilename, LZ4IO_compressMultipleFilenames */
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#include "lz4hc.h" /* LZ4HC_DEFAULT_CLEVEL */
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#include "lz4.h" /* LZ4_VERSION_STRING */
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/****************************
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* OS-specific Includes
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*****************************/
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#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(_WIN32)
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# include <io.h> /* _isatty */
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# if defined(__DJGPP__)
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# include <unistd.h>
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# define _isatty isatty
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# define _fileno fileno
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# endif
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# define IS_CONSOLE(stdStream) _isatty(_fileno(stdStream))
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#else
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# include <unistd.h> /* isatty */
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# define IS_CONSOLE(stdStream) isatty(fileno(stdStream))
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#endif
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/*****************************
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* Constants
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******************************/
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#define COMPRESSOR_NAME "LZ4 command line interface"
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#define AUTHOR "Yann Collet"
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#define WELCOME_MESSAGE "*** %s %i-bits v%s, by %s ***\n", COMPRESSOR_NAME, (int)(sizeof(void*)*8), LZ4_VERSION_STRING, AUTHOR
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#define LZ4_EXTENSION ".lz4"
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#define LZ4CAT "lz4cat"
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#define UNLZ4 "unlz4"
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#define KB *(1U<<10)
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#define MB *(1U<<20)
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#define GB *(1U<<30)
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#define LZ4_BLOCKSIZEID_DEFAULT 7
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/*-************************************
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* Macros
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***************************************/
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#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
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#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
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static unsigned displayLevel = 2; /* 0 : no display ; 1: errors only ; 2 : downgradable normal ; 3 : non-downgradable normal; 4 : + information */
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/*-************************************
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* Local Variables
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***************************************/
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static const char* programName;
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/*-************************************
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* Exceptions
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***************************************/
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#define DEBUG 0
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#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
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#define EXM_THROW(error, ...) \
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{ \
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DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
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DISPLAYLEVEL(1, "Error %i : ", error); \
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DISPLAYLEVEL(1, __VA_ARGS__); \
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DISPLAYLEVEL(1, "\n"); \
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exit(error); \
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}
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/*-************************************
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* Version modifiers
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***************************************/
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#define EXTENDED_ARGUMENTS
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#define EXTENDED_HELP
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#define EXTENDED_FORMAT
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#define DEFAULT_COMPRESSOR LZ4IO_compressFilename
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#define DEFAULT_DECOMPRESSOR LZ4IO_decompressFilename
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int LZ4IO_compressFilename_Legacy(const char* input_filename, const char* output_filename, int compressionlevel); /* hidden function */
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/*-***************************
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* Functions
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*****************************/
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static int usage(void)
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{
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DISPLAY( "Usage :\n");
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DISPLAY( " %s [arg] [input] [output]\n", programName);
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DISPLAY( "\n");
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DISPLAY( "input : a filename\n");
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DISPLAY( " with no FILE, or when FILE is - or %s, read standard input\n", stdinmark);
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DISPLAY( "Arguments :\n");
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DISPLAY( " -1 : Fast compression (default) \n");
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DISPLAY( " -9 : High compression \n");
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DISPLAY( " -d : decompression (default for %s extension)\n", LZ4_EXTENSION);
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DISPLAY( " -z : force compression\n");
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DISPLAY( " -f : overwrite output without prompting \n");
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DISPLAY( " -h/-H : display help/long help and exit\n");
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return 0;
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}
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static int usage_advanced(void)
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{
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DISPLAY(WELCOME_MESSAGE);
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usage();
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DISPLAY( "\n");
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DISPLAY( "Advanced arguments :\n");
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DISPLAY( " -V : display Version number and exit\n");
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DISPLAY( " -v : verbose mode\n");
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DISPLAY( " -q : suppress warnings; specify twice to suppress errors too\n");
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DISPLAY( " -c : force write to standard output, even if it is the console\n");
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DISPLAY( " -t : test compressed file integrity\n");
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DISPLAY( " -m : multiple input files (implies automatic output filenames)\n");
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DISPLAY( " -l : compress using Legacy format (Linux kernel compression)\n");
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DISPLAY( " -B# : Block size [4-7](default : 7)\n");
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DISPLAY( " -BD : Block dependency (improve compression ratio)\n");
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/* DISPLAY( " -BX : enable block checksum (default:disabled)\n"); *//* Option currently inactive */
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DISPLAY( "--no-frame-crc : disable stream checksum (default:enabled)\n");
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DISPLAY( "--content-size : compressed frame includes original size (default:not present)\n");
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DISPLAY( "--[no-]sparse : sparse mode (default:enabled on file, disabled on stdout)\n");
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DISPLAY( "Benchmark arguments :\n");
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DISPLAY( "Benchmark arguments :\n");
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DISPLAY( " -b# : benchmark file(s), using # compression level (default : 1) \n");
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DISPLAY( " -e# : test all compression levels from -bX to # (default: 1)\n");
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DISPLAY( " -i# : iteration loops [1-9](default : 3), benchmark mode only\n");
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#if defined(ENABLE_LZ4C_LEGACY_OPTIONS)
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DISPLAY( "Legacy arguments :\n");
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DISPLAY( " -c0 : fast compression\n");
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DISPLAY( " -c1 : high compression\n");
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DISPLAY( " -hc : high compression\n");
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DISPLAY( " -y : overwrite output without prompting \n");
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#endif /* ENABLE_LZ4C_LEGACY_OPTIONS */
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EXTENDED_HELP;
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return 0;
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}
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static int usage_longhelp(void)
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{
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usage_advanced();
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DISPLAY( "\n");
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DISPLAY( "****************************\n");
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DISPLAY( "***** Advanced comment *****\n");
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DISPLAY( "****************************\n");
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DISPLAY( "\n");
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DISPLAY( "Which values can [output] have ? \n");
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DISPLAY( "---------------------------------\n");
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DISPLAY( "[output] : a filename \n");
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DISPLAY( " '%s', or '-' for standard output (pipe mode)\n", stdoutmark);
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DISPLAY( " '%s' to discard output (test mode) \n", NULL_OUTPUT);
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DISPLAY( "[output] can be left empty. In this case, it receives the following value :\n");
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DISPLAY( " - if stdout is not the console, then [output] = stdout \n");
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DISPLAY( " - if stdout is console : \n");
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DISPLAY( " + for compression, output to filename%s \n", LZ4_EXTENSION);
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DISPLAY( " + for decompression, output to filename without '%s'\n", LZ4_EXTENSION);
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DISPLAY( " > if input filename has no '%s' extension : error \n", LZ4_EXTENSION);
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DISPLAY( "\n");
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DISPLAY( "Compression levels : \n");
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DISPLAY( "---------------------\n");
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DISPLAY( "-0 ... -2 => Fast compression, all identicals\n");
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DISPLAY( "-3 ... -%d => High compression; higher number == more compression but slower\n", LZ4HC_MAX_CLEVEL);
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DISPLAY( "\n");
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DISPLAY( "stdin, stdout and the console : \n");
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DISPLAY( "--------------------------------\n");
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DISPLAY( "To protect the console from binary flooding (bad argument mistake)\n");
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DISPLAY( "%s will refuse to read from console, or write to console \n", programName);
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DISPLAY( "except if '-c' command is specified, to force output to console \n");
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DISPLAY( "\n");
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DISPLAY( "Simple example :\n");
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DISPLAY( "----------------\n");
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DISPLAY( "1 : compress 'filename' fast, using default output name 'filename.lz4'\n");
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DISPLAY( " %s filename\n", programName);
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DISPLAY( "\n");
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DISPLAY( "Short arguments can be aggregated. For example :\n");
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DISPLAY( "----------------------------------\n");
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DISPLAY( "2 : compress 'filename' in high compression mode, overwrite output if exists\n");
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DISPLAY( " %s -9 -f filename \n", programName);
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DISPLAY( " is equivalent to :\n");
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DISPLAY( " %s -9f filename \n", programName);
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DISPLAY( "\n");
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DISPLAY( "%s can be used in 'pure pipe mode'. For example :\n", programName);
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DISPLAY( "-------------------------------------\n");
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DISPLAY( "3 : compress data stream from 'generator', send result to 'consumer'\n");
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DISPLAY( " generator | %s | consumer \n", programName);
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#if defined(ENABLE_LZ4C_LEGACY_OPTIONS)
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DISPLAY( "\n");
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DISPLAY( "***** Warning *****\n");
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DISPLAY( "Legacy arguments take precedence. Therefore : \n");
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DISPLAY( "---------------------------------\n");
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DISPLAY( " %s -hc filename\n", programName);
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DISPLAY( "means 'compress filename in high compression mode'\n");
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DISPLAY( "It is not equivalent to :\n");
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DISPLAY( " %s -h -c filename\n", programName);
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DISPLAY( "which would display help text and exit\n");
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#endif /* ENABLE_LZ4C_LEGACY_OPTIONS */
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return 0;
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}
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static int badusage(void)
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{
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DISPLAYLEVEL(1, "Incorrect parameters\n");
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if (displayLevel >= 1) usage();
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exit(1);
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}
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static void waitEnter(void)
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{
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DISPLAY("Press enter to continue...\n");
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(void)getchar();
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}
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/*! readU32FromChar() :
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@return : unsigned integer value reach from input in `char` format
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Will also modify `*stringPtr`, advancing it to position where it stopped reading.
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Note : this function can overflow if result > MAX_UINT */
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static unsigned readU32FromChar(const char** stringPtr)
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{
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unsigned result = 0;
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while ((**stringPtr >='0') && (**stringPtr <='9'))
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result *= 10, result += **stringPtr - '0', (*stringPtr)++ ;
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return result;
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}
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int main(int argc, const char** argv)
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{
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int i,
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cLevel=1,
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cLevelLast=1,
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decode=0,
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bench=0,
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legacy_format=0,
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forceStdout=0,
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forceCompress=0,
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main_pause=0,
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multiple_inputs=0,
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operationResult=0;
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const char* input_filename=0;
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const char* output_filename=0;
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char* dynNameSpace=0;
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const char** inFileNames = NULL;
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unsigned ifnIdx=0;
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char nullOutput[] = NULL_OUTPUT;
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char extension[] = LZ4_EXTENSION;
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int blockSize;
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/* Init */
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programName = argv[0];
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LZ4IO_setOverwrite(0);
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blockSize = LZ4IO_setBlockSizeID(LZ4_BLOCKSIZEID_DEFAULT);
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/* lz4cat predefined behavior */
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if (!strcmp(programName, LZ4CAT)) { decode=1; forceStdout=1; output_filename=stdoutmark; displayLevel=1; }
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if (!strcmp(programName, UNLZ4)) { decode=1; }
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/* command switches */
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for(i=1; i<argc; i++) {
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const char* argument = argv[i];
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if(!argument) continue; /* Protection if argument empty */
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/* long commands (--long-word) */
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if (!strcmp(argument, "--compress")) { forceCompress = 1; continue; }
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if ((!strcmp(argument, "--decompress"))
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|| (!strcmp(argument, "--uncompress"))) { decode = 1; continue; }
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if (!strcmp(argument, "--multiple")) { multiple_inputs = 1; if (inFileNames==NULL) inFileNames = (const char**)malloc(argc * sizeof(char*)); continue; }
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if (!strcmp(argument, "--test")) { decode = 1; LZ4IO_setOverwrite(1); output_filename=nulmark; continue; }
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if (!strcmp(argument, "--force")) { LZ4IO_setOverwrite(1); continue; }
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if (!strcmp(argument, "--no-force")) { LZ4IO_setOverwrite(0); continue; }
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if ((!strcmp(argument, "--stdout"))
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|| (!strcmp(argument, "--to-stdout"))) { forceStdout=1; output_filename=stdoutmark; displayLevel=1; continue; }
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if (!strcmp(argument, "--frame-crc")) { LZ4IO_setStreamChecksumMode(1); continue; }
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if (!strcmp(argument, "--no-frame-crc")) { LZ4IO_setStreamChecksumMode(0); continue; }
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if (!strcmp(argument, "--content-size")) { LZ4IO_setContentSize(1); continue; }
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if (!strcmp(argument, "--no-content-size")) { LZ4IO_setContentSize(0); continue; }
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if (!strcmp(argument, "--sparse")) { LZ4IO_setSparseFile(2); continue; }
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if (!strcmp(argument, "--no-sparse")) { LZ4IO_setSparseFile(0); continue; }
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if (!strcmp(argument, "--verbose")) { displayLevel=4; continue; }
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if (!strcmp(argument, "--quiet")) { if (displayLevel) displayLevel--; continue; }
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if (!strcmp(argument, "--version")) { DISPLAY(WELCOME_MESSAGE); return 0; }
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if (!strcmp(argument, "--keep")) { continue; } /* keep source file (default anyway; just for xz/lzma compatibility) */
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/* Short commands (note : aggregated short commands are allowed) */
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if (argument[0]=='-') {
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/* '-' means stdin/stdout */
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if (argument[1]==0) {
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if (!input_filename) input_filename=stdinmark;
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else output_filename=stdoutmark;
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}
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while (argument[1]!=0) {
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argument ++;
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#if defined(ENABLE_LZ4C_LEGACY_OPTIONS)
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/* Legacy arguments (-c0, -c1, -hc, -y, -s) */
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if ((argument[0]=='c') && (argument[1]=='0')) { cLevel=0; argument++; continue; } /* -c0 (fast compression) */
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if ((argument[0]=='c') && (argument[1]=='1')) { cLevel=9; argument++; continue; } /* -c1 (high compression) */
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if ((argument[0]=='h') && (argument[1]=='c')) { cLevel=9; argument++; continue; } /* -hc (high compression) */
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if (*argument=='y') { LZ4IO_setOverwrite(1); continue; } /* -y (answer 'yes' to overwrite permission) */
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#endif /* ENABLE_LZ4C_LEGACY_OPTIONS */
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if ((*argument>='0') && (*argument<='9')) {
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cLevel = readU32FromChar(&argument);
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argument--;
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continue;
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}
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switch(argument[0])
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{
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/* Display help */
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case 'V': DISPLAY(WELCOME_MESSAGE); goto _cleanup; /* Version */
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case 'h': usage_advanced(); goto _cleanup;
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case 'H': usage_longhelp(); goto _cleanup;
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case 'e':
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argument++;
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cLevelLast = readU32FromChar(&argument);
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argument--;
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break;
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/* Compression (default) */
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case 'z': forceCompress = 1; break;
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/* Use Legacy format (ex : Linux kernel compression) */
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case 'l': legacy_format = 1; blockSize = 8 MB; break;
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/* Decoding */
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case 'd': decode=1; break;
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/* Force stdout, even if stdout==console */
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case 'c': forceStdout=1; output_filename=stdoutmark; displayLevel=1; break;
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/* Test integrity */
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case 't': decode=1; LZ4IO_setTestMode(1); output_filename=nulmark; break;
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/* Overwrite */
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case 'f': LZ4IO_setOverwrite(1); break;
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/* Verbose mode */
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case 'v': displayLevel=4; break;
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/* Quiet mode */
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case 'q': if (displayLevel) displayLevel--; break;
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/* keep source file (default anyway, so useless) (for xz/lzma compatibility) */
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case 'k': break;
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/* Modify Block Properties */
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case 'B':
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while (argument[1]!=0) {
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int exitBlockProperties=0;
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switch(argument[1])
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{
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case '4':
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case '5':
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case '6':
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case '7':
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{ int B = argument[1] - '0';
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blockSize = LZ4IO_setBlockSizeID(B);
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BMK_setBlocksize(blockSize);
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argument++;
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break;
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}
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case 'D': LZ4IO_setBlockMode(LZ4IO_blockLinked); argument++; break;
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case 'X': LZ4IO_setBlockChecksumMode(1); argument ++; break; /* currently disabled */
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default : exitBlockProperties=1;
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}
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if (exitBlockProperties) break;
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}
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break;
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/* Benchmark */
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case 'b': bench=1; multiple_inputs=1;
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if (inFileNames == NULL)
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inFileNames = (const char**) malloc(argc * sizeof(char*));
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break;
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/* Treat non-option args as input files. See https://code.google.com/p/lz4/issues/detail?id=151 */
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case 'm': multiple_inputs=1;
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if (inFileNames == NULL)
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inFileNames = (const char**) malloc(argc * sizeof(char*));
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break;
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/* Modify Nb Iterations (benchmark only) */
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case 'i':
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{ unsigned iters;
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argument++;
|
|
iters = readU32FromChar(&argument);
|
|
argument--;
|
|
BMK_setNbIterations(iters);
|
|
}
|
|
break;
|
|
|
|
/* Pause at the end (hidden option) */
|
|
case 'p': main_pause=1; BMK_setPause(); break;
|
|
|
|
/* Specific commands for customized versions */
|
|
EXTENDED_ARGUMENTS;
|
|
|
|
/* Unrecognised command */
|
|
default : badusage();
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* Store in *inFileNames[] if -m is used. */
|
|
if (multiple_inputs) { inFileNames[ifnIdx++]=argument; continue; }
|
|
|
|
/* Store first non-option arg in input_filename to preserve original cli logic. */
|
|
if (!input_filename) { input_filename=argument; continue; }
|
|
|
|
/* Second non-option arg in output_filename to preserve original cli logic. */
|
|
if (!output_filename) {
|
|
output_filename=argument;
|
|
if (!strcmp (output_filename, nullOutput)) output_filename = nulmark;
|
|
continue;
|
|
}
|
|
|
|
/* 3rd non-option arg should not exist */
|
|
DISPLAYLEVEL(1, "Warning : %s won't be used ! Do you want multiple input files (-m) ? \n", argument);
|
|
}
|
|
|
|
DISPLAYLEVEL(3, WELCOME_MESSAGE);
|
|
if (!decode) DISPLAYLEVEL(4, "Blocks size : %i KB\n", blockSize>>10);
|
|
|
|
/* No input filename ==> use stdin */
|
|
if (multiple_inputs) input_filename = inFileNames[0], output_filename = (const char*)(inFileNames[0]);
|
|
if(!input_filename) { input_filename=stdinmark; }
|
|
|
|
/* Check if input is defined as console; trigger an error in this case */
|
|
if (!strcmp(input_filename, stdinmark) && IS_CONSOLE(stdin) ) {
|
|
DISPLAYLEVEL(1, "refusing to read from a console\n");
|
|
exit(1);
|
|
}
|
|
|
|
/* Check if benchmark is selected */
|
|
if (bench) {
|
|
int bmkResult = BMK_benchFiles(inFileNames, ifnIdx, cLevel, cLevelLast);
|
|
free((void*)inFileNames);
|
|
return bmkResult;
|
|
}
|
|
|
|
/* No output filename ==> try to select one automatically (when possible) */
|
|
while (!output_filename) {
|
|
if (!IS_CONSOLE(stdout)) { output_filename=stdoutmark; break; } /* Default to stdout whenever possible (i.e. not a console) */
|
|
if ((!decode) && !(forceCompress)) { /* auto-determine compression or decompression, based on file extension */
|
|
size_t const l = strlen(input_filename);
|
|
if (!strcmp(input_filename+(l-4), LZ4_EXTENSION)) decode=1;
|
|
}
|
|
if (!decode) { /* compression to file */
|
|
size_t const l = strlen(input_filename);
|
|
dynNameSpace = (char*)calloc(1,l+5);
|
|
if (dynNameSpace==NULL) exit(1);
|
|
strcpy(dynNameSpace, input_filename);
|
|
strcat(dynNameSpace, LZ4_EXTENSION);
|
|
output_filename = dynNameSpace;
|
|
DISPLAYLEVEL(2, "Compressed filename will be : %s \n", output_filename);
|
|
break;
|
|
}
|
|
/* decompression to file (automatic name will work only if input filename has correct format extension) */
|
|
{ size_t outl;
|
|
size_t inl = strlen(input_filename);
|
|
dynNameSpace = (char*)calloc(1,inl+1);
|
|
strcpy(dynNameSpace, input_filename);
|
|
outl = inl;
|
|
if (inl>4)
|
|
while ((outl >= inl-4) && (input_filename[outl] == extension[outl-inl+4])) dynNameSpace[outl--]=0;
|
|
if (outl != inl-5) { DISPLAYLEVEL(1, "Cannot determine an output filename\n"); badusage(); }
|
|
output_filename = dynNameSpace;
|
|
DISPLAYLEVEL(2, "Decoding file %s \n", output_filename);
|
|
}
|
|
}
|
|
|
|
/* Check if output is defined as console; trigger an error in this case */
|
|
if (!strcmp(output_filename,stdoutmark) && IS_CONSOLE(stdout) && !forceStdout) {
|
|
DISPLAYLEVEL(1, "refusing to write to console without -c\n");
|
|
exit(1);
|
|
}
|
|
|
|
/* Downgrade notification level in pure pipe mode (stdin + stdout) and multiple file mode */
|
|
if (!strcmp(input_filename, stdinmark) && !strcmp(output_filename,stdoutmark) && (displayLevel==2)) displayLevel=1;
|
|
if ((multiple_inputs) && (displayLevel==2)) displayLevel=1;
|
|
|
|
/* IO Stream/File */
|
|
LZ4IO_setNotificationLevel(displayLevel);
|
|
if (decode) {
|
|
if (multiple_inputs)
|
|
operationResult = LZ4IO_decompressMultipleFilenames(inFileNames, ifnIdx, LZ4_EXTENSION);
|
|
else
|
|
operationResult = DEFAULT_DECOMPRESSOR(input_filename, output_filename);
|
|
} else {
|
|
/* compression is default action */
|
|
if (legacy_format) {
|
|
DISPLAYLEVEL(3, "! Generating compressed LZ4 using Legacy format (deprecated) ! \n");
|
|
LZ4IO_compressFilename_Legacy(input_filename, output_filename, cLevel);
|
|
} else {
|
|
if (multiple_inputs)
|
|
operationResult = LZ4IO_compressMultipleFilenames(inFileNames, ifnIdx, LZ4_EXTENSION, cLevel);
|
|
else
|
|
operationResult = DEFAULT_COMPRESSOR(input_filename, output_filename, cLevel);
|
|
}
|
|
}
|
|
|
|
_cleanup:
|
|
if (main_pause) waitEnter();
|
|
free(dynNameSpace);
|
|
free((void*)inFileNames);
|
|
return operationResult;
|
|
}
|