2042 lines
57 KiB
C
2042 lines
57 KiB
C
/* $NetBSD: bzip2.c,v 1.8 2009/04/11 11:10:43 lukem Exp $ */
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/*-----------------------------------------------------------*/
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/*--- A block-sorting, lossless compressor bzip2.c ---*/
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/*-----------------------------------------------------------*/
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/* ------------------------------------------------------------------
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This file is part of bzip2/libbzip2, a program and library for
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lossless, block-sorting data compression.
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bzip2/libbzip2 version 1.0.5 of 10 December 2007
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Copyright (C) 1996-2007 Julian Seward <jseward@bzip.org>
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Please read the WARNING, DISCLAIMER and PATENTS sections in the
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README file.
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This program is released under the terms of the license contained
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in the file LICENSE.
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------------------------------------------------------------------ */
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/* Place a 1 beside your platform, and 0 elsewhere.
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Generic 32-bit Unix.
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Also works on 64-bit Unix boxes.
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This is the default.
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*/
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#define BZ_UNIX 1
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/*--
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Win32, as seen by Jacob Navia's excellent
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port of (Chris Fraser & David Hanson)'s excellent
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lcc compiler. Or with MS Visual C.
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This is selected automatically if compiled by a compiler which
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defines _WIN32, not including the Cygwin GCC.
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--*/
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#define BZ_LCCWIN32 0
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#if defined(_WIN32) && !defined(__CYGWIN__)
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#undef BZ_LCCWIN32
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#define BZ_LCCWIN32 1
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#undef BZ_UNIX
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#define BZ_UNIX 0
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#endif
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/*---------------------------------------------*/
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/*--
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Some stuff for all platforms.
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--*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include <math.h>
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#include <errno.h>
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#include <ctype.h>
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#include "bzlib.h"
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#define ERROR_IF_EOF(i) { if ((i) == EOF) ioError(); }
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#define ERROR_IF_NOT_ZERO(i) { if ((i) != 0) ioError(); }
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#define ERROR_IF_MINUS_ONE(i) { if ((i) == (-1)) ioError(); }
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/*---------------------------------------------*/
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/*--
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Platform-specific stuff.
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--*/
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#if BZ_UNIX
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# include <fcntl.h>
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# include <sys/types.h>
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# include <utime.h>
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# include <unistd.h>
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# include <sys/stat.h>
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# include <sys/times.h>
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# define PATH_SEP '/'
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# define MY_LSTAT lstat
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# define MY_STAT stat
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# define MY_S_ISREG S_ISREG
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# define MY_S_ISDIR S_ISDIR
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# define APPEND_FILESPEC(root, name) \
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root=snocString((root), (name))
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# define APPEND_FLAG(root, name) \
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root=snocString((root), (name))
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# define SET_BINARY_MODE(fd) /**/
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# ifdef __GNUC__
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# define NORETURN __attribute__ ((noreturn))
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# else
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# define NORETURN /**/
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# endif
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# ifdef __DJGPP__
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# include <io.h>
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# include <fcntl.h>
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# undef MY_LSTAT
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# undef MY_STAT
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# define MY_LSTAT stat
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# define MY_STAT stat
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# undef SET_BINARY_MODE
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# define SET_BINARY_MODE(fd) \
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do { \
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int retVal = setmode ( fileno ( fd ), \
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O_BINARY ); \
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ERROR_IF_MINUS_ONE ( retVal ); \
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} while ( 0 )
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# endif
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# ifdef __CYGWIN__
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# include <io.h>
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# include <fcntl.h>
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# undef SET_BINARY_MODE
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# define SET_BINARY_MODE(fd) \
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do { \
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int retVal = setmode ( fileno ( fd ), \
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O_BINARY ); \
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ERROR_IF_MINUS_ONE ( retVal ); \
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} while ( 0 )
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# endif
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#endif /* BZ_UNIX */
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#if BZ_LCCWIN32
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# include <io.h>
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# include <fcntl.h>
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# include <sys\stat.h>
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# define NORETURN /**/
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# define PATH_SEP '\\'
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# define MY_LSTAT _stat
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# define MY_STAT _stat
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# define MY_S_ISREG(x) ((x) & _S_IFREG)
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# define MY_S_ISDIR(x) ((x) & _S_IFDIR)
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# define APPEND_FLAG(root, name) \
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root=snocString((root), (name))
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# define APPEND_FILESPEC(root, name) \
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root = snocString ((root), (name))
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# define SET_BINARY_MODE(fd) \
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do { \
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int retVal = setmode ( fileno ( fd ), \
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O_BINARY ); \
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ERROR_IF_MINUS_ONE ( retVal ); \
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} while ( 0 )
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#endif /* BZ_LCCWIN32 */
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/*---------------------------------------------*/
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/*--
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Some more stuff for all platforms :-)
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--*/
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typedef char Char;
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typedef unsigned char Bool;
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typedef unsigned char UChar;
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typedef int Int32;
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typedef unsigned int UInt32;
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typedef short Int16;
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typedef unsigned short UInt16;
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#define True ((Bool)1)
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#define False ((Bool)0)
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/*--
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IntNative is your platform's `native' int size.
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Only here to avoid probs with 64-bit platforms.
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--*/
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typedef int IntNative;
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/*---------------------------------------------------*/
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/*--- Misc (file handling) data decls ---*/
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/*---------------------------------------------------*/
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Int32 verbosity;
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Bool keepInputFiles, smallMode, deleteOutputOnInterrupt;
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Bool forceOverwrite, testFailsExist, unzFailsExist, noisy;
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Int32 numFileNames, numFilesProcessed, blockSize100k;
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Int32 exitValue;
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/*-- source modes; F==file, I==stdin, O==stdout --*/
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#define SM_I2O 1
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#define SM_F2O 2
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#define SM_F2F 3
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/*-- operation modes --*/
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#define OM_Z 1
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#define OM_UNZ 2
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#define OM_TEST 3
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Int32 opMode;
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Int32 srcMode;
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#define FILE_NAME_LEN 1034
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Int32 longestFileName;
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Char inName [FILE_NAME_LEN];
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Char outName[FILE_NAME_LEN];
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Char tmpName[FILE_NAME_LEN];
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Char *progName;
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Char progNameReally[FILE_NAME_LEN];
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FILE *outputHandleJustInCase;
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Int32 workFactor;
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static void panic ( const Char* ) NORETURN;
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static void ioError ( void ) NORETURN;
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static void outOfMemory ( void ) NORETURN;
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static void configError ( void ) NORETURN;
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static void crcError ( void ) NORETURN;
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static void cleanUpAndFail ( Int32 ) NORETURN;
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static void compressedStreamEOF ( void ) NORETURN;
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static void copyFileName ( Char*, const Char* );
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static void* myMalloc ( Int32 );
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static void applySavedFileAttrToOutputFile ( IntNative fd );
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static FILE* fopen_output_safely ( Char*, const char* );
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/*---------------------------------------------------*/
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/*--- An implementation of 64-bit ints. Sigh. ---*/
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/*--- Roll on widespread deployment of ANSI C9X ! ---*/
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/*---------------------------------------------------*/
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typedef
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struct { UChar b[8]; }
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UInt64;
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static
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void uInt64_from_UInt32s ( UInt64* n, UInt32 lo32, UInt32 hi32 )
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{
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n->b[7] = (UChar)((hi32 >> 24) & 0xFF);
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n->b[6] = (UChar)((hi32 >> 16) & 0xFF);
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n->b[5] = (UChar)((hi32 >> 8) & 0xFF);
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n->b[4] = (UChar) (hi32 & 0xFF);
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n->b[3] = (UChar)((lo32 >> 24) & 0xFF);
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n->b[2] = (UChar)((lo32 >> 16) & 0xFF);
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n->b[1] = (UChar)((lo32 >> 8) & 0xFF);
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n->b[0] = (UChar) (lo32 & 0xFF);
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}
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static
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double uInt64_to_double ( UInt64* n )
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{
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Int32 i;
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double base = 1.0;
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double sum = 0.0;
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for (i = 0; i < 8; i++) {
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sum += base * (double)(n->b[i]);
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base *= 256.0;
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}
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return sum;
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}
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static
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Bool uInt64_isZero ( UInt64* n )
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{
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Int32 i;
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for (i = 0; i < 8; i++)
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if (n->b[i] != 0) return 0;
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return 1;
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}
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/* Divide *n by 10, and return the remainder. */
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static
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Int32 uInt64_qrm10 ( UInt64* n )
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{
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UInt32 rem, tmp;
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Int32 i;
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rem = 0;
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for (i = 7; i >= 0; i--) {
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tmp = rem * 256 + n->b[i];
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n->b[i] = tmp / 10;
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rem = tmp % 10;
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}
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return rem;
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}
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/* ... and the Whole Entire Point of all this UInt64 stuff is
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so that we can supply the following function.
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*/
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static
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void uInt64_toAscii ( char* outbuf, UInt64* n )
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{
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Int32 i, q;
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UChar buf[32];
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Int32 nBuf = 0;
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UInt64 n_copy = *n;
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do {
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q = uInt64_qrm10 ( &n_copy );
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buf[nBuf] = q + '0';
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nBuf++;
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} while (!uInt64_isZero(&n_copy));
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outbuf[nBuf] = 0;
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for (i = 0; i < nBuf; i++)
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outbuf[i] = buf[nBuf-i-1];
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}
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/*---------------------------------------------------*/
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/*--- Processing of complete files and streams ---*/
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/*---------------------------------------------------*/
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/*---------------------------------------------*/
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static
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Bool myfeof ( FILE* f )
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{
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Int32 c = fgetc ( f );
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if (c == EOF) return True;
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ungetc ( c, f );
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return False;
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}
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/*---------------------------------------------*/
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static
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void compressStream ( FILE *stream, FILE *zStream )
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{
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BZFILE* bzf = NULL;
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UChar ibuf[5000];
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Int32 nIbuf;
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UInt32 nbytes_in_lo32, nbytes_in_hi32;
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UInt32 nbytes_out_lo32, nbytes_out_hi32;
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Int32 bzerr, bzerr_dummy, ret;
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SET_BINARY_MODE(stream);
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SET_BINARY_MODE(zStream);
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if (ferror(stream)) goto errhandler_io;
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if (ferror(zStream)) goto errhandler_io;
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bzf = BZ2_bzWriteOpen ( &bzerr, zStream,
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blockSize100k, verbosity, workFactor );
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if (bzerr != BZ_OK) goto errhandler;
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if (verbosity >= 2) fprintf ( stderr, "\n" );
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while (True) {
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if (myfeof(stream)) break;
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nIbuf = fread ( ibuf, sizeof(UChar), 5000, stream );
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if (ferror(stream)) goto errhandler_io;
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if (nIbuf > 0) BZ2_bzWrite ( &bzerr, bzf, (void*)ibuf, nIbuf );
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if (bzerr != BZ_OK) goto errhandler;
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}
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BZ2_bzWriteClose64 ( &bzerr, bzf, 0,
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&nbytes_in_lo32, &nbytes_in_hi32,
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&nbytes_out_lo32, &nbytes_out_hi32 );
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if (bzerr != BZ_OK) goto errhandler;
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if (ferror(zStream)) goto errhandler_io;
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ret = fflush ( zStream );
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if (ret == EOF) goto errhandler_io;
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if (zStream != stdout) {
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Int32 fd = fileno ( zStream );
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if (fd < 0) goto errhandler_io;
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applySavedFileAttrToOutputFile ( fd );
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ret = fclose ( zStream );
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outputHandleJustInCase = NULL;
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if (ret == EOF) goto errhandler_io;
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}
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outputHandleJustInCase = NULL;
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if (ferror(stream)) goto errhandler_io;
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ret = fclose ( stream );
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if (ret == EOF) goto errhandler_io;
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if (verbosity >= 1) {
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if (nbytes_in_lo32 == 0 && nbytes_in_hi32 == 0) {
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fprintf ( stderr, " no data compressed.\n");
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} else {
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Char buf_nin[32], buf_nout[32];
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UInt64 nbytes_in, nbytes_out;
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double nbytes_in_d, nbytes_out_d;
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uInt64_from_UInt32s ( &nbytes_in,
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nbytes_in_lo32, nbytes_in_hi32 );
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uInt64_from_UInt32s ( &nbytes_out,
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nbytes_out_lo32, nbytes_out_hi32 );
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nbytes_in_d = uInt64_to_double ( &nbytes_in );
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nbytes_out_d = uInt64_to_double ( &nbytes_out );
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uInt64_toAscii ( buf_nin, &nbytes_in );
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uInt64_toAscii ( buf_nout, &nbytes_out );
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fprintf ( stderr, "%6.3f:1, %6.3f bits/byte, "
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"%5.2f%% saved, %s in, %s out.\n",
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nbytes_in_d / nbytes_out_d,
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(8.0 * nbytes_out_d) / nbytes_in_d,
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100.0 * (1.0 - nbytes_out_d / nbytes_in_d),
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buf_nin,
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buf_nout
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);
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}
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}
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return;
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errhandler:
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BZ2_bzWriteClose64 ( &bzerr_dummy, bzf, 1,
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&nbytes_in_lo32, &nbytes_in_hi32,
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&nbytes_out_lo32, &nbytes_out_hi32 );
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switch (bzerr) {
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case BZ_CONFIG_ERROR:
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configError(); break;
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case BZ_MEM_ERROR:
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outOfMemory (); break;
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case BZ_IO_ERROR:
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errhandler_io:
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ioError(); break;
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default:
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panic ( "compress:unexpected error" );
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}
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|
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panic ( "compress:end" );
|
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/*notreached*/
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}
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|
|
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|
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/*---------------------------------------------*/
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static
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Bool uncompressStream ( FILE *zStream, FILE *stream )
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{
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BZFILE* bzf = NULL;
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Int32 bzerr, bzerr_dummy, ret, nread, streamNo, i;
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UChar obuf[5000];
|
|
UChar unused[BZ_MAX_UNUSED];
|
|
Int32 nUnused;
|
|
void* unusedTmpV = NULL;
|
|
UChar* unusedTmp;
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|
|
nUnused = 0;
|
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streamNo = 0;
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|
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SET_BINARY_MODE(stream);
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SET_BINARY_MODE(zStream);
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|
|
if (ferror(stream)) goto errhandler_io;
|
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if (ferror(zStream)) goto errhandler_io;
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|
|
|
while (True) {
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|
|
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bzf = BZ2_bzReadOpen (
|
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&bzerr, zStream, verbosity,
|
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(int)smallMode, unused, nUnused
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|
);
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if (bzf == NULL || bzerr != BZ_OK) goto errhandler;
|
|
streamNo++;
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|
|
while (bzerr == BZ_OK) {
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nread = BZ2_bzRead ( &bzerr, bzf, obuf, 5000 );
|
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if (bzerr == BZ_DATA_ERROR_MAGIC) goto trycat;
|
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if ((bzerr == BZ_OK || bzerr == BZ_STREAM_END) && nread > 0)
|
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fwrite ( obuf, sizeof(UChar), nread, stream );
|
|
if (ferror(stream)) goto errhandler_io;
|
|
}
|
|
if (bzerr != BZ_STREAM_END) goto errhandler;
|
|
|
|
BZ2_bzReadGetUnused ( &bzerr, bzf, (void*)(&unusedTmpV), &nUnused );
|
|
if (bzerr != BZ_OK) panic ( "decompress:bzReadGetUnused" );
|
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|
|
unusedTmp = (UChar*)unusedTmpV;
|
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for (i = 0; i < nUnused; i++) unused[i] = unusedTmp[i];
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|
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BZ2_bzReadClose ( &bzerr, bzf );
|
|
if (bzerr != BZ_OK) panic ( "decompress:bzReadGetUnused" );
|
|
|
|
if (nUnused == 0 && myfeof(zStream)) break;
|
|
}
|
|
|
|
closeok:
|
|
if (ferror(zStream)) goto errhandler_io;
|
|
if (stream != stdout) {
|
|
Int32 fd = fileno ( stream );
|
|
if (fd < 0) goto errhandler_io;
|
|
applySavedFileAttrToOutputFile ( fd );
|
|
}
|
|
ret = fclose ( zStream );
|
|
if (ret == EOF) goto errhandler_io;
|
|
|
|
if (ferror(stream)) goto errhandler_io;
|
|
ret = fflush ( stream );
|
|
if (ret != 0) goto errhandler_io;
|
|
if (stream != stdout) {
|
|
ret = fclose ( stream );
|
|
outputHandleJustInCase = NULL;
|
|
if (ret == EOF) goto errhandler_io;
|
|
}
|
|
outputHandleJustInCase = NULL;
|
|
if (verbosity >= 2) fprintf ( stderr, "\n " );
|
|
return True;
|
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|
|
trycat:
|
|
if (forceOverwrite) {
|
|
rewind(zStream);
|
|
while (True) {
|
|
if (myfeof(zStream)) break;
|
|
nread = fread ( obuf, sizeof(UChar), 5000, zStream );
|
|
if (ferror(zStream)) goto errhandler_io;
|
|
if (nread > 0) fwrite ( obuf, sizeof(UChar), nread, stream );
|
|
if (ferror(stream)) goto errhandler_io;
|
|
}
|
|
goto closeok;
|
|
}
|
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|
|
errhandler:
|
|
BZ2_bzReadClose ( &bzerr_dummy, bzf );
|
|
switch (bzerr) {
|
|
case BZ_CONFIG_ERROR:
|
|
configError(); break;
|
|
case BZ_IO_ERROR:
|
|
errhandler_io:
|
|
ioError(); break;
|
|
case BZ_DATA_ERROR:
|
|
crcError();
|
|
case BZ_MEM_ERROR:
|
|
outOfMemory();
|
|
case BZ_UNEXPECTED_EOF:
|
|
compressedStreamEOF();
|
|
case BZ_DATA_ERROR_MAGIC:
|
|
if (zStream != stdin) fclose(zStream);
|
|
if (stream != stdout) fclose(stream);
|
|
if (streamNo == 1) {
|
|
return False;
|
|
} else {
|
|
if (noisy)
|
|
fprintf ( stderr,
|
|
"\n%s: %s: trailing garbage after EOF ignored\n",
|
|
progName, inName );
|
|
return True;
|
|
}
|
|
default:
|
|
panic ( "decompress:unexpected error" );
|
|
}
|
|
|
|
panic ( "decompress:end" );
|
|
return True; /*notreached*/
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
Bool testStream ( FILE *zStream )
|
|
{
|
|
BZFILE* bzf = NULL;
|
|
Int32 bzerr, bzerr_dummy, ret, nread, streamNo, i;
|
|
UChar obuf[5000];
|
|
UChar unused[BZ_MAX_UNUSED];
|
|
Int32 nUnused;
|
|
void* unusedTmpV = NULL;
|
|
UChar* unusedTmp = NULL;
|
|
|
|
nUnused = 0;
|
|
streamNo = 0;
|
|
|
|
SET_BINARY_MODE(zStream);
|
|
if (ferror(zStream)) goto errhandler_io;
|
|
|
|
while (True) {
|
|
|
|
bzf = BZ2_bzReadOpen (
|
|
&bzerr, zStream, verbosity,
|
|
(int)smallMode, unused, nUnused
|
|
);
|
|
if (bzf == NULL || bzerr != BZ_OK) goto errhandler;
|
|
streamNo++;
|
|
|
|
while (bzerr == BZ_OK) {
|
|
nread = BZ2_bzRead ( &bzerr, bzf, obuf, 5000 );
|
|
if (bzerr == BZ_DATA_ERROR_MAGIC) goto errhandler;
|
|
}
|
|
if (bzerr != BZ_STREAM_END) goto errhandler;
|
|
|
|
BZ2_bzReadGetUnused ( &bzerr, bzf, (void*)(&unusedTmpV), &nUnused );
|
|
if (bzerr != BZ_OK) panic ( "test:bzReadGetUnused" );
|
|
|
|
unusedTmp = (UChar*)unusedTmpV;
|
|
for (i = 0; i < nUnused; i++) unused[i] = unusedTmp[i];
|
|
|
|
BZ2_bzReadClose ( &bzerr, bzf );
|
|
if (bzerr != BZ_OK) panic ( "test:bzReadGetUnused" );
|
|
if (nUnused == 0 && myfeof(zStream)) break;
|
|
|
|
}
|
|
|
|
if (ferror(zStream)) goto errhandler_io;
|
|
ret = fclose ( zStream );
|
|
if (ret == EOF) goto errhandler_io;
|
|
|
|
if (verbosity >= 2) fprintf ( stderr, "\n " );
|
|
return True;
|
|
|
|
errhandler:
|
|
BZ2_bzReadClose ( &bzerr_dummy, bzf );
|
|
if (verbosity == 0)
|
|
fprintf ( stderr, "%s: %s: ", progName, inName );
|
|
switch (bzerr) {
|
|
case BZ_CONFIG_ERROR:
|
|
configError(); break;
|
|
case BZ_IO_ERROR:
|
|
errhandler_io:
|
|
ioError(); break;
|
|
case BZ_DATA_ERROR:
|
|
fprintf ( stderr,
|
|
"data integrity (CRC) error in data\n" );
|
|
return False;
|
|
case BZ_MEM_ERROR:
|
|
outOfMemory();
|
|
case BZ_UNEXPECTED_EOF:
|
|
fprintf ( stderr,
|
|
"file ends unexpectedly\n" );
|
|
return False;
|
|
case BZ_DATA_ERROR_MAGIC:
|
|
if (zStream != stdin) fclose(zStream);
|
|
if (streamNo == 1) {
|
|
fprintf ( stderr,
|
|
"bad magic number (file not created by bzip2)\n" );
|
|
return False;
|
|
} else {
|
|
if (noisy)
|
|
fprintf ( stderr,
|
|
"trailing garbage after EOF ignored\n" );
|
|
return True;
|
|
}
|
|
default:
|
|
panic ( "test:unexpected error" );
|
|
}
|
|
|
|
panic ( "test:end" );
|
|
return True; /*notreached*/
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------*/
|
|
/*--- Error [non-] handling grunge ---*/
|
|
/*---------------------------------------------------*/
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void setExit ( Int32 v )
|
|
{
|
|
if (v > exitValue) exitValue = v;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void cadvise ( void )
|
|
{
|
|
if (noisy)
|
|
fprintf (
|
|
stderr,
|
|
"\nIt is possible that the compressed file(s) have become corrupted.\n"
|
|
"You can use the -tvv option to test integrity of such files.\n\n"
|
|
"You can use the `bzip2recover' program to attempt to recover\n"
|
|
"data from undamaged sections of corrupted files.\n\n"
|
|
);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void showFileNames ( void )
|
|
{
|
|
if (noisy)
|
|
fprintf (
|
|
stderr,
|
|
"\tInput file = %s, output file = %s\n",
|
|
inName, outName
|
|
);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void cleanUpAndFail ( Int32 ec )
|
|
{
|
|
IntNative retVal;
|
|
struct MY_STAT statBuf;
|
|
|
|
if ( srcMode == SM_F2F
|
|
&& opMode != OM_TEST
|
|
&& deleteOutputOnInterrupt ) {
|
|
|
|
/* Check whether input file still exists. Delete output file
|
|
only if input exists to avoid loss of data. Joerg Prante, 5
|
|
January 2002. (JRS 06-Jan-2002: other changes in 1.0.2 mean
|
|
this is less likely to happen. But to be ultra-paranoid, we
|
|
do the check anyway.) */
|
|
retVal = MY_STAT ( inName, &statBuf );
|
|
if (retVal == 0) {
|
|
if (noisy)
|
|
fprintf ( stderr,
|
|
"%s: Deleting output file %s, if it exists.\n",
|
|
progName, outName );
|
|
if (outputHandleJustInCase != NULL)
|
|
fclose ( outputHandleJustInCase );
|
|
retVal = remove ( outName );
|
|
if (retVal != 0)
|
|
fprintf ( stderr,
|
|
"%s: WARNING: deletion of output file "
|
|
"(apparently) failed.\n",
|
|
progName );
|
|
} else {
|
|
fprintf ( stderr,
|
|
"%s: WARNING: deletion of output file suppressed\n",
|
|
progName );
|
|
fprintf ( stderr,
|
|
"%s: since input file no longer exists. Output file\n",
|
|
progName );
|
|
fprintf ( stderr,
|
|
"%s: `%s' may be incomplete.\n",
|
|
progName, outName );
|
|
fprintf ( stderr,
|
|
"%s: I suggest doing an integrity test (bzip2 -tv)"
|
|
" of it.\n",
|
|
progName );
|
|
}
|
|
}
|
|
|
|
if (noisy && numFileNames > 0 && numFilesProcessed < numFileNames) {
|
|
fprintf ( stderr,
|
|
"%s: WARNING: some files have not been processed:\n"
|
|
"%s: %d specified on command line, %d not processed yet.\n\n",
|
|
progName, progName,
|
|
numFileNames, numFileNames - numFilesProcessed );
|
|
}
|
|
setExit(ec);
|
|
exit(exitValue);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void panic ( const Char* s )
|
|
{
|
|
fprintf ( stderr,
|
|
"\n%s: PANIC -- internal consistency error:\n"
|
|
"\t%s\n"
|
|
"\tThis is a BUG. Please report it to me at:\n"
|
|
"\tjseward@bzip.org\n",
|
|
progName, s );
|
|
showFileNames();
|
|
cleanUpAndFail( 3 );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void crcError ( void )
|
|
{
|
|
fprintf ( stderr,
|
|
"\n%s: Data integrity error when decompressing.\n",
|
|
progName );
|
|
showFileNames();
|
|
cadvise();
|
|
cleanUpAndFail( 2 );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void compressedStreamEOF ( void )
|
|
{
|
|
if (noisy) {
|
|
fprintf ( stderr,
|
|
"\n%s: Compressed file ends unexpectedly;\n\t"
|
|
"perhaps it is corrupted? *Possible* reason follows.\n",
|
|
progName );
|
|
perror ( progName );
|
|
showFileNames();
|
|
cadvise();
|
|
}
|
|
cleanUpAndFail( 2 );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void ioError ( void )
|
|
{
|
|
fprintf ( stderr,
|
|
"\n%s: I/O or other error, bailing out. "
|
|
"Possible reason follows.\n",
|
|
progName );
|
|
perror ( progName );
|
|
showFileNames();
|
|
cleanUpAndFail( 1 );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void mySignalCatcher ( IntNative n )
|
|
{
|
|
fprintf ( stderr,
|
|
"\n%s: Control-C or similar caught, quitting.\n",
|
|
progName );
|
|
cleanUpAndFail(1);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
#ifndef SMALL
|
|
static
|
|
void mySIGSEGVorSIGBUScatcher ( IntNative n )
|
|
{
|
|
if (opMode == OM_Z)
|
|
fprintf (
|
|
stderr,
|
|
"\n%s: Caught a SIGSEGV or SIGBUS whilst compressing.\n"
|
|
"\n"
|
|
" Possible causes are (most likely first):\n"
|
|
" (1) This computer has unreliable memory or cache hardware\n"
|
|
" (a surprisingly common problem; try a different machine.)\n"
|
|
" (2) A bug in the compiler used to create this executable\n"
|
|
" (unlikely, if you didn't compile bzip2 yourself.)\n"
|
|
" (3) A real bug in bzip2 -- I hope this should never be the case.\n"
|
|
" The user's manual, Section 4.3, has more info on (1) and (2).\n"
|
|
" \n"
|
|
" If you suspect this is a bug in bzip2, or are unsure about (1)\n"
|
|
" or (2), feel free to report it to me at: jseward@bzip.org.\n"
|
|
" Section 4.3 of the user's manual describes the info a useful\n"
|
|
" bug report should have. If the manual is available on your\n"
|
|
" system, please try and read it before mailing me. If you don't\n"
|
|
" have the manual or can't be bothered to read it, mail me anyway.\n"
|
|
"\n",
|
|
progName );
|
|
else
|
|
fprintf (
|
|
stderr,
|
|
"\n%s: Caught a SIGSEGV or SIGBUS whilst decompressing.\n"
|
|
"\n"
|
|
" Possible causes are (most likely first):\n"
|
|
" (1) The compressed data is corrupted, and bzip2's usual checks\n"
|
|
" failed to detect this. Try bzip2 -tvv my_file.bz2.\n"
|
|
" (2) This computer has unreliable memory or cache hardware\n"
|
|
" (a surprisingly common problem; try a different machine.)\n"
|
|
" (3) A bug in the compiler used to create this executable\n"
|
|
" (unlikely, if you didn't compile bzip2 yourself.)\n"
|
|
" (4) A real bug in bzip2 -- I hope this should never be the case.\n"
|
|
" The user's manual, Section 4.3, has more info on (2) and (3).\n"
|
|
" \n"
|
|
" If you suspect this is a bug in bzip2, or are unsure about (2)\n"
|
|
" or (3), feel free to report it to me at: jseward@bzip.org.\n"
|
|
" Section 4.3 of the user's manual describes the info a useful\n"
|
|
" bug report should have. If the manual is available on your\n"
|
|
" system, please try and read it before mailing me. If you don't\n"
|
|
" have the manual or can't be bothered to read it, mail me anyway.\n"
|
|
"\n",
|
|
progName );
|
|
|
|
showFileNames();
|
|
if (opMode == OM_Z)
|
|
cleanUpAndFail( 3 ); else
|
|
{ cadvise(); cleanUpAndFail( 2 ); }
|
|
}
|
|
#endif
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void outOfMemory ( void )
|
|
{
|
|
fprintf ( stderr,
|
|
"\n%s: couldn't allocate enough memory\n",
|
|
progName );
|
|
showFileNames();
|
|
cleanUpAndFail(1);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void configError ( void )
|
|
{
|
|
fprintf ( stderr,
|
|
"bzip2: I'm not configured correctly for this platform!\n"
|
|
"\tI require Int32, Int16 and Char to have sizes\n"
|
|
"\tof 4, 2 and 1 bytes to run properly, and they don't.\n"
|
|
"\tProbably you can fix this by defining them correctly,\n"
|
|
"\tand recompiling. Bye!\n" );
|
|
setExit(3);
|
|
exit(exitValue);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------*/
|
|
/*--- The main driver machinery ---*/
|
|
/*---------------------------------------------------*/
|
|
|
|
/* All rather crufty. The main problem is that input files
|
|
are stat()d multiple times before use. This should be
|
|
cleaned up.
|
|
*/
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void pad ( Char *s )
|
|
{
|
|
Int32 i;
|
|
if ( (Int32)strlen(s) >= longestFileName ) return;
|
|
for (i = 1; i <= longestFileName - (Int32)strlen(s); i++)
|
|
fprintf ( stderr, " " );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void copyFileName ( Char* to, const Char* from )
|
|
{
|
|
if ( strlen(from) > FILE_NAME_LEN-10 ) {
|
|
fprintf (
|
|
stderr,
|
|
"bzip2: file name\n`%s'\n"
|
|
"is suspiciously (more than %d chars) long.\n"
|
|
"Try using a reasonable file name instead. Sorry! :-)\n",
|
|
from, FILE_NAME_LEN-10
|
|
);
|
|
setExit(1);
|
|
exit(exitValue);
|
|
}
|
|
|
|
strncpy(to,from,FILE_NAME_LEN-10);
|
|
to[FILE_NAME_LEN-10]='\0';
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
Bool fileExists ( Char* name )
|
|
{
|
|
FILE *tmp = fopen ( name, "rb" );
|
|
Bool exists = (tmp != NULL);
|
|
if (tmp != NULL) fclose ( tmp );
|
|
return exists;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
/* Open an output file safely with O_EXCL and good permissions.
|
|
This avoids a race condition in versions < 1.0.2, in which
|
|
the file was first opened and then had its interim permissions
|
|
set safely. We instead use open() to create the file with
|
|
the interim permissions required. (--- --- rw-).
|
|
|
|
For non-Unix platforms, if we are not worrying about
|
|
security issues, simple this simply behaves like fopen.
|
|
*/
|
|
static
|
|
FILE* fopen_output_safely ( Char* name, const char* mode )
|
|
{
|
|
# if BZ_UNIX
|
|
FILE* fp;
|
|
IntNative fh;
|
|
fh = open(name, O_WRONLY|O_CREAT|O_EXCL, S_IWUSR|S_IRUSR);
|
|
if (fh == -1) return NULL;
|
|
fp = fdopen(fh, mode);
|
|
if (fp == NULL) close(fh);
|
|
return fp;
|
|
# else
|
|
return fopen(name, mode);
|
|
# endif
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
/*--
|
|
if in doubt, return True
|
|
--*/
|
|
static
|
|
Bool notAStandardFile ( Char* name )
|
|
{
|
|
IntNative i;
|
|
struct MY_STAT statBuf;
|
|
|
|
i = MY_LSTAT ( name, &statBuf );
|
|
if (i != 0) return True;
|
|
if (MY_S_ISREG(statBuf.st_mode)) return False;
|
|
return True;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
/*--
|
|
rac 11/21/98 see if file has hard links to it
|
|
--*/
|
|
static
|
|
Int32 countHardLinks ( Char* name )
|
|
{
|
|
IntNative i;
|
|
struct MY_STAT statBuf;
|
|
|
|
i = MY_LSTAT ( name, &statBuf );
|
|
if (i != 0) return 0;
|
|
return (statBuf.st_nlink - 1);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
/* Copy modification date, access date, permissions and owner from the
|
|
source to destination file. We have to copy this meta-info off
|
|
into fileMetaInfo before starting to compress / decompress it,
|
|
because doing it afterwards means we get the wrong access time.
|
|
|
|
To complicate matters, in compress() and decompress() below, the
|
|
sequence of tests preceding the call to saveInputFileMetaInfo()
|
|
involves calling fileExists(), which in turn establishes its result
|
|
by attempting to fopen() the file, and if successful, immediately
|
|
fclose()ing it again. So we have to assume that the fopen() call
|
|
does not cause the access time field to be updated.
|
|
|
|
Reading of the man page for stat() (man 2 stat) on RedHat 7.2 seems
|
|
to imply that merely doing open() will not affect the access time.
|
|
Therefore we merely need to hope that the C library only does
|
|
open() as a result of fopen(), and not any kind of read()-ahead
|
|
cleverness.
|
|
|
|
It sounds pretty fragile to me. Whether this carries across
|
|
robustly to arbitrary Unix-like platforms (or even works robustly
|
|
on this one, RedHat 7.2) is unknown to me. Nevertheless ...
|
|
*/
|
|
#if BZ_UNIX
|
|
static
|
|
struct MY_STAT fileMetaInfo;
|
|
#endif
|
|
|
|
static
|
|
void saveInputFileMetaInfo ( Char *srcName )
|
|
{
|
|
# if BZ_UNIX
|
|
IntNative retVal;
|
|
/* Note use of stat here, not lstat. */
|
|
retVal = MY_STAT( srcName, &fileMetaInfo );
|
|
ERROR_IF_NOT_ZERO ( retVal );
|
|
# endif
|
|
}
|
|
|
|
|
|
static
|
|
void applySavedTimeInfoToOutputFile ( Char *dstName )
|
|
{
|
|
# if BZ_UNIX
|
|
IntNative retVal;
|
|
struct utimbuf uTimBuf;
|
|
|
|
uTimBuf.actime = fileMetaInfo.st_atime;
|
|
uTimBuf.modtime = fileMetaInfo.st_mtime;
|
|
|
|
retVal = utime ( dstName, &uTimBuf );
|
|
ERROR_IF_NOT_ZERO ( retVal );
|
|
# endif
|
|
}
|
|
|
|
static
|
|
void applySavedFileAttrToOutputFile ( IntNative fd )
|
|
{
|
|
# if BZ_UNIX
|
|
IntNative retVal;
|
|
|
|
retVal = fchmod ( fd, fileMetaInfo.st_mode );
|
|
ERROR_IF_NOT_ZERO ( retVal );
|
|
|
|
(void) fchown ( fd, fileMetaInfo.st_uid, fileMetaInfo.st_gid );
|
|
/* chown() will in many cases return with EPERM, which can
|
|
be safely ignored.
|
|
*/
|
|
# endif
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
Bool containsDubiousChars ( Char* name )
|
|
{
|
|
# if BZ_UNIX
|
|
/* On unix, files can contain any characters and the file expansion
|
|
* is performed by the shell.
|
|
*/
|
|
return False;
|
|
# else /* ! BZ_UNIX */
|
|
/* On non-unix (Win* platforms), wildcard characters are not allowed in
|
|
* filenames.
|
|
*/
|
|
for (; *name != '\0'; name++)
|
|
if (*name == '?' || *name == '*') return True;
|
|
return False;
|
|
# endif /* BZ_UNIX */
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
#define BZ_N_SUFFIX_PAIRS 4
|
|
|
|
const Char* zSuffix[BZ_N_SUFFIX_PAIRS]
|
|
= { ".bz2", ".bz", ".tbz2", ".tbz" };
|
|
const Char* unzSuffix[BZ_N_SUFFIX_PAIRS]
|
|
= { "", "", ".tar", ".tar" };
|
|
|
|
static
|
|
Bool hasSuffix ( Char* s, const Char* suffix )
|
|
{
|
|
Int32 ns = strlen(s);
|
|
Int32 nx = strlen(suffix);
|
|
if (ns < nx) return False;
|
|
if (strcmp(s + ns - nx, suffix) == 0) return True;
|
|
return False;
|
|
}
|
|
|
|
static
|
|
Bool mapSuffix ( Char* name,
|
|
const Char* oldSuffix,
|
|
const Char* newSuffix )
|
|
{
|
|
if (!hasSuffix(name,oldSuffix)) return False;
|
|
name[strlen(name)-strlen(oldSuffix)] = 0;
|
|
strcat ( name, newSuffix );
|
|
return True;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void compress ( Char *name )
|
|
{
|
|
FILE *inStr;
|
|
FILE *outStr;
|
|
Int32 n, i;
|
|
struct MY_STAT statBuf;
|
|
|
|
deleteOutputOnInterrupt = False;
|
|
|
|
if (name == NULL && srcMode != SM_I2O)
|
|
panic ( "compress: bad modes\n" );
|
|
|
|
switch (srcMode) {
|
|
case SM_I2O:
|
|
copyFileName ( inName, "(stdin)" );
|
|
copyFileName ( outName, "(stdout)" );
|
|
break;
|
|
case SM_F2F:
|
|
copyFileName ( inName, name );
|
|
copyFileName ( outName, name );
|
|
strcat ( outName, ".bz2" );
|
|
break;
|
|
case SM_F2O:
|
|
copyFileName ( inName, name );
|
|
copyFileName ( outName, "(stdout)" );
|
|
break;
|
|
}
|
|
|
|
if ( srcMode != SM_I2O && containsDubiousChars ( inName ) ) {
|
|
if (noisy)
|
|
fprintf ( stderr, "%s: There are no files matching `%s'.\n",
|
|
progName, inName );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( srcMode != SM_I2O && !fileExists ( inName ) ) {
|
|
fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
|
|
progName, inName, strerror(errno) );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
for (i = 0; i < BZ_N_SUFFIX_PAIRS; i++) {
|
|
if (hasSuffix(inName, zSuffix[i])) {
|
|
if (noisy)
|
|
fprintf ( stderr,
|
|
"%s: Input file %s already has %s suffix.\n",
|
|
progName, inName, zSuffix[i] );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
}
|
|
if ( srcMode == SM_F2F || srcMode == SM_F2O ) {
|
|
MY_STAT(inName, &statBuf);
|
|
if ( MY_S_ISDIR(statBuf.st_mode) ) {
|
|
fprintf( stderr,
|
|
"%s: Input file %s is a directory.\n",
|
|
progName,inName);
|
|
setExit(1);
|
|
return;
|
|
}
|
|
}
|
|
if ( srcMode == SM_F2F && !forceOverwrite && notAStandardFile ( inName )) {
|
|
if (noisy)
|
|
fprintf ( stderr, "%s: Input file %s is not a normal file.\n",
|
|
progName, inName );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( srcMode == SM_F2F && fileExists ( outName ) ) {
|
|
if (forceOverwrite) {
|
|
remove(outName);
|
|
} else {
|
|
fprintf ( stderr, "%s: Output file %s already exists.\n",
|
|
progName, outName );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
}
|
|
if ( srcMode == SM_F2F && !forceOverwrite &&
|
|
(n=countHardLinks ( inName )) > 0) {
|
|
fprintf ( stderr, "%s: Input file %s has %d other link%s.\n",
|
|
progName, inName, n, n > 1 ? "s" : "" );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
|
|
if ( srcMode == SM_F2F ) {
|
|
/* Save the file's meta-info before we open it. Doing it later
|
|
means we mess up the access times. */
|
|
saveInputFileMetaInfo ( inName );
|
|
}
|
|
|
|
switch ( srcMode ) {
|
|
|
|
case SM_I2O:
|
|
inStr = stdin;
|
|
outStr = stdout;
|
|
if ( isatty ( fileno ( stdout ) ) ) {
|
|
fprintf ( stderr,
|
|
"%s: I won't write compressed data to a terminal.\n",
|
|
progName );
|
|
fprintf ( stderr, "%s: For help, type: `%s --help'.\n",
|
|
progName, progName );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
break;
|
|
|
|
case SM_F2O:
|
|
inStr = fopen ( inName, "rb" );
|
|
outStr = stdout;
|
|
if ( isatty ( fileno ( stdout ) ) ) {
|
|
fprintf ( stderr,
|
|
"%s: I won't write compressed data to a terminal.\n",
|
|
progName );
|
|
fprintf ( stderr, "%s: For help, type: `%s --help'.\n",
|
|
progName, progName );
|
|
if ( inStr != NULL ) fclose ( inStr );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
if ( inStr == NULL ) {
|
|
fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
|
|
progName, inName, strerror(errno) );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
break;
|
|
|
|
case SM_F2F:
|
|
inStr = fopen ( inName, "rb" );
|
|
outStr = fopen_output_safely ( outName, "wb" );
|
|
if ( outStr == NULL) {
|
|
fprintf ( stderr, "%s: Can't create output file %s: %s.\n",
|
|
progName, outName, strerror(errno) );
|
|
if ( inStr != NULL ) fclose ( inStr );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( inStr == NULL ) {
|
|
fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
|
|
progName, inName, strerror(errno) );
|
|
if ( outStr != NULL ) fclose ( outStr );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
break;
|
|
|
|
default:
|
|
panic ( "compress: bad srcMode" );
|
|
break;
|
|
}
|
|
|
|
if (verbosity >= 1) {
|
|
fprintf ( stderr, " %s: ", inName );
|
|
pad ( inName );
|
|
fflush ( stderr );
|
|
}
|
|
|
|
/*--- Now the input and output handles are sane. Do the Biz. ---*/
|
|
outputHandleJustInCase = outStr;
|
|
deleteOutputOnInterrupt = True;
|
|
compressStream ( inStr, outStr );
|
|
outputHandleJustInCase = NULL;
|
|
|
|
/*--- If there was an I/O error, we won't get here. ---*/
|
|
if ( srcMode == SM_F2F ) {
|
|
applySavedTimeInfoToOutputFile ( outName );
|
|
deleteOutputOnInterrupt = False;
|
|
if ( !keepInputFiles ) {
|
|
IntNative retVal = remove ( inName );
|
|
ERROR_IF_NOT_ZERO ( retVal );
|
|
}
|
|
}
|
|
|
|
deleteOutputOnInterrupt = False;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void uncompress ( Char *name )
|
|
{
|
|
FILE *inStr;
|
|
FILE *outStr;
|
|
Int32 n, i;
|
|
Bool magicNumberOK;
|
|
Bool cantGuess;
|
|
struct MY_STAT statBuf;
|
|
|
|
deleteOutputOnInterrupt = False;
|
|
|
|
if (name == NULL && srcMode != SM_I2O)
|
|
panic ( "uncompress: bad modes\n" );
|
|
|
|
cantGuess = False;
|
|
switch (srcMode) {
|
|
case SM_I2O:
|
|
copyFileName ( inName, "(stdin)" );
|
|
copyFileName ( outName, "(stdout)" );
|
|
break;
|
|
case SM_F2F:
|
|
copyFileName ( inName, name );
|
|
copyFileName ( outName, name );
|
|
for (i = 0; i < BZ_N_SUFFIX_PAIRS; i++)
|
|
if (mapSuffix(outName,zSuffix[i],unzSuffix[i]))
|
|
goto zzz;
|
|
cantGuess = True;
|
|
strcat ( outName, ".out" );
|
|
break;
|
|
case SM_F2O:
|
|
copyFileName ( inName, name );
|
|
copyFileName ( outName, "(stdout)" );
|
|
break;
|
|
}
|
|
|
|
zzz:
|
|
if ( srcMode != SM_I2O && containsDubiousChars ( inName ) ) {
|
|
if (noisy)
|
|
fprintf ( stderr, "%s: There are no files matching `%s'.\n",
|
|
progName, inName );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( srcMode != SM_I2O && !fileExists ( inName ) ) {
|
|
fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
|
|
progName, inName, strerror(errno) );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( srcMode == SM_F2F || srcMode == SM_F2O ) {
|
|
MY_STAT(inName, &statBuf);
|
|
if ( MY_S_ISDIR(statBuf.st_mode) ) {
|
|
fprintf( stderr,
|
|
"%s: Input file %s is a directory.\n",
|
|
progName,inName);
|
|
setExit(1);
|
|
return;
|
|
}
|
|
}
|
|
if ( srcMode == SM_F2F && !forceOverwrite && notAStandardFile ( inName )) {
|
|
if (noisy)
|
|
fprintf ( stderr, "%s: Input file %s is not a normal file.\n",
|
|
progName, inName );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( /* srcMode == SM_F2F implied && */ cantGuess ) {
|
|
if (noisy)
|
|
fprintf ( stderr,
|
|
"%s: Can't guess original name for %s -- using %s\n",
|
|
progName, inName, outName );
|
|
/* just a warning, no return */
|
|
}
|
|
if ( srcMode == SM_F2F && fileExists ( outName ) ) {
|
|
if (forceOverwrite) {
|
|
remove(outName);
|
|
} else {
|
|
fprintf ( stderr, "%s: Output file %s already exists.\n",
|
|
progName, outName );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
}
|
|
if ( srcMode == SM_F2F && !forceOverwrite &&
|
|
(n=countHardLinks ( inName ) ) > 0) {
|
|
fprintf ( stderr, "%s: Input file %s has %d other link%s.\n",
|
|
progName, inName, n, n > 1 ? "s" : "" );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
|
|
if ( srcMode == SM_F2F ) {
|
|
/* Save the file's meta-info before we open it. Doing it later
|
|
means we mess up the access times. */
|
|
saveInputFileMetaInfo ( inName );
|
|
}
|
|
|
|
switch ( srcMode ) {
|
|
|
|
case SM_I2O:
|
|
inStr = stdin;
|
|
outStr = stdout;
|
|
if ( isatty ( fileno ( stdin ) ) ) {
|
|
fprintf ( stderr,
|
|
"%s: I won't read compressed data from a terminal.\n",
|
|
progName );
|
|
fprintf ( stderr, "%s: For help, type: `%s --help'.\n",
|
|
progName, progName );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
break;
|
|
|
|
case SM_F2O:
|
|
inStr = fopen ( inName, "rb" );
|
|
outStr = stdout;
|
|
if ( inStr == NULL ) {
|
|
fprintf ( stderr, "%s: Can't open input file %s:%s.\n",
|
|
progName, inName, strerror(errno) );
|
|
if ( inStr != NULL ) fclose ( inStr );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
break;
|
|
|
|
case SM_F2F:
|
|
inStr = fopen ( inName, "rb" );
|
|
outStr = fopen_output_safely ( outName, "wb" );
|
|
if ( outStr == NULL) {
|
|
fprintf ( stderr, "%s: Can't create output file %s: %s.\n",
|
|
progName, outName, strerror(errno) );
|
|
if ( inStr != NULL ) fclose ( inStr );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( inStr == NULL ) {
|
|
fprintf ( stderr, "%s: Can't open input file %s: %s.\n",
|
|
progName, inName, strerror(errno) );
|
|
if ( outStr != NULL ) fclose ( outStr );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
break;
|
|
|
|
default:
|
|
panic ( "uncompress: bad srcMode" );
|
|
break;
|
|
}
|
|
|
|
if (verbosity >= 1) {
|
|
fprintf ( stderr, " %s: ", inName );
|
|
pad ( inName );
|
|
fflush ( stderr );
|
|
}
|
|
|
|
/*--- Now the input and output handles are sane. Do the Biz. ---*/
|
|
outputHandleJustInCase = outStr;
|
|
deleteOutputOnInterrupt = True;
|
|
magicNumberOK = uncompressStream ( inStr, outStr );
|
|
outputHandleJustInCase = NULL;
|
|
|
|
/*--- If there was an I/O error, we won't get here. ---*/
|
|
if ( magicNumberOK ) {
|
|
if ( srcMode == SM_F2F ) {
|
|
applySavedTimeInfoToOutputFile ( outName );
|
|
deleteOutputOnInterrupt = False;
|
|
if ( !keepInputFiles ) {
|
|
IntNative retVal = remove ( inName );
|
|
ERROR_IF_NOT_ZERO ( retVal );
|
|
}
|
|
}
|
|
} else {
|
|
unzFailsExist = True;
|
|
deleteOutputOnInterrupt = False;
|
|
if ( srcMode == SM_F2F ) {
|
|
IntNative retVal = remove ( outName );
|
|
ERROR_IF_NOT_ZERO ( retVal );
|
|
}
|
|
}
|
|
deleteOutputOnInterrupt = False;
|
|
|
|
if ( magicNumberOK ) {
|
|
if (verbosity >= 1)
|
|
fprintf ( stderr, "done\n" );
|
|
} else {
|
|
setExit(2);
|
|
if (verbosity >= 1)
|
|
fprintf ( stderr, "not a bzip2 file.\n" ); else
|
|
fprintf ( stderr,
|
|
"%s: %s is not a bzip2 file.\n",
|
|
progName, inName );
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void testf ( Char *name )
|
|
{
|
|
FILE *inStr;
|
|
Bool allOK;
|
|
struct MY_STAT statBuf;
|
|
|
|
deleteOutputOnInterrupt = False;
|
|
|
|
if (name == NULL && srcMode != SM_I2O)
|
|
panic ( "testf: bad modes\n" );
|
|
|
|
copyFileName ( outName, "(none)" );
|
|
switch (srcMode) {
|
|
case SM_I2O: copyFileName ( inName, "(stdin)" ); break;
|
|
case SM_F2F: copyFileName ( inName, name ); break;
|
|
case SM_F2O: copyFileName ( inName, name ); break;
|
|
}
|
|
|
|
if ( srcMode != SM_I2O && containsDubiousChars ( inName ) ) {
|
|
if (noisy)
|
|
fprintf ( stderr, "%s: There are no files matching `%s'.\n",
|
|
progName, inName );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( srcMode != SM_I2O && !fileExists ( inName ) ) {
|
|
fprintf ( stderr, "%s: Can't open input %s: %s.\n",
|
|
progName, inName, strerror(errno) );
|
|
setExit(1);
|
|
return;
|
|
}
|
|
if ( srcMode != SM_I2O ) {
|
|
MY_STAT(inName, &statBuf);
|
|
if ( MY_S_ISDIR(statBuf.st_mode) ) {
|
|
fprintf( stderr,
|
|
"%s: Input file %s is a directory.\n",
|
|
progName,inName);
|
|
setExit(1);
|
|
return;
|
|
}
|
|
}
|
|
|
|
switch ( srcMode ) {
|
|
|
|
case SM_I2O:
|
|
if ( isatty ( fileno ( stdin ) ) ) {
|
|
fprintf ( stderr,
|
|
"%s: I won't read compressed data from a terminal.\n",
|
|
progName );
|
|
fprintf ( stderr, "%s: For help, type: `%s --help'.\n",
|
|
progName, progName );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
inStr = stdin;
|
|
break;
|
|
|
|
case SM_F2O: case SM_F2F:
|
|
inStr = fopen ( inName, "rb" );
|
|
if ( inStr == NULL ) {
|
|
fprintf ( stderr, "%s: Can't open input file %s:%s.\n",
|
|
progName, inName, strerror(errno) );
|
|
setExit(1);
|
|
return;
|
|
};
|
|
break;
|
|
|
|
default:
|
|
panic ( "testf: bad srcMode" );
|
|
break;
|
|
}
|
|
|
|
if (verbosity >= 1) {
|
|
fprintf ( stderr, " %s: ", inName );
|
|
pad ( inName );
|
|
fflush ( stderr );
|
|
}
|
|
|
|
/*--- Now the input handle is sane. Do the Biz. ---*/
|
|
outputHandleJustInCase = NULL;
|
|
allOK = testStream ( inStr );
|
|
|
|
if (allOK && verbosity >= 1) fprintf ( stderr, "ok\n" );
|
|
if (!allOK) testFailsExist = True;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void license ( void )
|
|
{
|
|
fprintf ( stderr,
|
|
|
|
"bzip2, a block-sorting file compressor. "
|
|
"Version %s.\n"
|
|
" \n"
|
|
" Copyright (C) 1996-2007 by Julian Seward.\n"
|
|
" \n"
|
|
" This program is free software; you can redistribute it and/or modify\n"
|
|
" it under the terms set out in the LICENSE file, which is included\n"
|
|
" in the bzip2-1.0.5 source distribution.\n"
|
|
" \n"
|
|
" This program is distributed in the hope that it will be useful,\n"
|
|
" but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
|
|
" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n"
|
|
" LICENSE file for more details.\n"
|
|
" \n",
|
|
BZ2_bzlibVersion()
|
|
);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void usage ( Char *fullProgName )
|
|
{
|
|
fprintf (
|
|
stderr,
|
|
"bzip2, a block-sorting file compressor. "
|
|
"Version %s.\n"
|
|
"\n usage: %s [flags and input files in any order]\n"
|
|
"\n"
|
|
" -h --help print this message\n"
|
|
" -d --decompress force decompression\n"
|
|
" -z --compress force compression\n"
|
|
" -k --keep keep (don't delete) input files\n"
|
|
" -f --force overwrite existing output files\n"
|
|
" -t --test test compressed file integrity\n"
|
|
" -c --stdout output to standard out\n"
|
|
" -q --quiet suppress noncritical error messages\n"
|
|
" -v --verbose be verbose (a 2nd -v gives more)\n"
|
|
" -L --license display software version & license\n"
|
|
" -V --version display software version & license\n"
|
|
" -s --small use less memory (at most 2500k)\n"
|
|
" -1 .. -9 set block size to 100k .. 900k\n"
|
|
" --fast alias for -1\n"
|
|
" --best alias for -9\n"
|
|
"\n"
|
|
" If invoked as `bzip2', default action is to compress.\n"
|
|
" as `bunzip2', default action is to decompress.\n"
|
|
" as `bzcat', default action is to decompress to stdout.\n"
|
|
"\n"
|
|
" If no file names are given, bzip2 compresses or decompresses\n"
|
|
" from standard input to standard output. You can combine\n"
|
|
" short flags, so `-v -4' means the same as -v4 or -4v, &c.\n"
|
|
# if BZ_UNIX
|
|
"\n"
|
|
# endif
|
|
,
|
|
|
|
BZ2_bzlibVersion(),
|
|
fullProgName
|
|
);
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void redundant ( Char* flag )
|
|
{
|
|
fprintf (
|
|
stderr,
|
|
"%s: %s is redundant in versions 0.9.5 and above\n",
|
|
progName, flag );
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
/*--
|
|
All the garbage from here to main() is purely to
|
|
implement a linked list of command-line arguments,
|
|
into which main() copies argv[1 .. argc-1].
|
|
|
|
The purpose of this exercise is to facilitate
|
|
the expansion of wildcard characters * and ? in
|
|
filenames for OSs which don't know how to do it
|
|
themselves, like MSDOS, Windows 95 and NT.
|
|
|
|
The actual Dirty Work is done by the platform-
|
|
specific macro APPEND_FILESPEC.
|
|
--*/
|
|
|
|
typedef
|
|
struct zzzz {
|
|
Char *name;
|
|
struct zzzz *link;
|
|
}
|
|
Cell;
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void *myMalloc ( Int32 n )
|
|
{
|
|
void* p;
|
|
|
|
p = malloc ( (size_t)n );
|
|
if (p == NULL) outOfMemory ();
|
|
return p;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
Cell *mkCell ( void )
|
|
{
|
|
Cell *c;
|
|
|
|
c = (Cell*) myMalloc ( sizeof ( Cell ) );
|
|
c->name = NULL;
|
|
c->link = NULL;
|
|
return c;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
Cell *snocString ( Cell *root, Char *name )
|
|
{
|
|
if (root == NULL) {
|
|
Cell *tmp = mkCell();
|
|
tmp->name = (Char*) myMalloc ( 5 + strlen(name) );
|
|
strcpy ( tmp->name, name );
|
|
return tmp;
|
|
} else {
|
|
Cell *tmp = root;
|
|
while (tmp->link != NULL) tmp = tmp->link;
|
|
tmp->link = snocString ( tmp->link, name );
|
|
return root;
|
|
}
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
static
|
|
void addFlagsFromEnvVar ( Cell** argList, const Char* varName )
|
|
{
|
|
Int32 i, j, k;
|
|
Char *envbase, *p;
|
|
|
|
envbase = getenv(varName);
|
|
if (envbase != NULL) {
|
|
p = envbase;
|
|
i = 0;
|
|
while (True) {
|
|
if (p[i] == 0) break;
|
|
p += i;
|
|
i = 0;
|
|
while (isspace((Int32)(p[0]))) p++;
|
|
while (p[i] != 0 && !isspace((Int32)(p[i]))) i++;
|
|
if (i > 0) {
|
|
k = i; if (k > FILE_NAME_LEN-10) k = FILE_NAME_LEN-10;
|
|
for (j = 0; j < k; j++) tmpName[j] = p[j];
|
|
tmpName[k] = 0;
|
|
APPEND_FLAG(*argList, tmpName);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*---------------------------------------------*/
|
|
#define ISFLAG(s) (strcmp(aa->name, (s))==0)
|
|
|
|
IntNative main ( IntNative argc, Char *argv[] )
|
|
{
|
|
Int32 i, j;
|
|
Char *tmp;
|
|
Cell *argList;
|
|
Cell *aa;
|
|
Bool decode;
|
|
|
|
/*-- Be really really really paranoid :-) --*/
|
|
if (sizeof(Int32) != 4 || sizeof(UInt32) != 4 ||
|
|
sizeof(Int16) != 2 || sizeof(UInt16) != 2 ||
|
|
sizeof(Char) != 1 || sizeof(UChar) != 1)
|
|
configError();
|
|
|
|
/*-- Initialise --*/
|
|
outputHandleJustInCase = NULL;
|
|
smallMode = False;
|
|
keepInputFiles = False;
|
|
forceOverwrite = False;
|
|
noisy = True;
|
|
verbosity = 0;
|
|
blockSize100k = 9;
|
|
testFailsExist = False;
|
|
unzFailsExist = False;
|
|
numFileNames = 0;
|
|
numFilesProcessed = 0;
|
|
workFactor = 30;
|
|
deleteOutputOnInterrupt = False;
|
|
exitValue = 0;
|
|
i = j = 0; /* avoid bogus warning from egcs-1.1.X */
|
|
|
|
#ifndef SMALL
|
|
/*-- Set up signal handlers for mem access errors --*/
|
|
signal (SIGSEGV, mySIGSEGVorSIGBUScatcher);
|
|
# if BZ_UNIX
|
|
# ifndef __DJGPP__
|
|
signal (SIGBUS, mySIGSEGVorSIGBUScatcher);
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
copyFileName ( inName, "(none)" );
|
|
copyFileName ( outName, "(none)" );
|
|
|
|
copyFileName ( progNameReally, argv[0] );
|
|
progName = &progNameReally[0];
|
|
for (tmp = &progNameReally[0]; *tmp != '\0'; tmp++)
|
|
if (*tmp == PATH_SEP) progName = tmp + 1;
|
|
|
|
|
|
/*-- Copy flags from env var BZIP2, and
|
|
expand filename wildcards in arg list.
|
|
--*/
|
|
argList = NULL;
|
|
addFlagsFromEnvVar ( &argList, "BZIP2" );
|
|
addFlagsFromEnvVar ( &argList, "BZIP" );
|
|
for (i = 1; i <= argc-1; i++)
|
|
APPEND_FILESPEC(argList, argv[i]);
|
|
|
|
|
|
/*-- Find the length of the longest filename --*/
|
|
longestFileName = 7;
|
|
numFileNames = 0;
|
|
decode = True;
|
|
for (aa = argList; aa != NULL; aa = aa->link) {
|
|
if (ISFLAG("--")) { decode = False; continue; }
|
|
if (aa->name[0] == '-' && decode) continue;
|
|
numFileNames++;
|
|
if (longestFileName < (Int32)strlen(aa->name) )
|
|
longestFileName = (Int32)strlen(aa->name);
|
|
}
|
|
|
|
|
|
/*-- Determine source modes; flag handling may change this too. --*/
|
|
if (numFileNames == 0)
|
|
srcMode = SM_I2O; else srcMode = SM_F2F;
|
|
|
|
|
|
/*-- Determine what to do (compress/uncompress/test/cat). --*/
|
|
/*-- Note that subsequent flag handling may change this. --*/
|
|
opMode = OM_Z;
|
|
|
|
if ( (strstr ( progName, "unzip" ) != 0) ||
|
|
(strstr ( progName, "UNZIP" ) != 0) )
|
|
opMode = OM_UNZ;
|
|
|
|
if ( (strstr ( progName, "z2cat" ) != 0) ||
|
|
(strstr ( progName, "Z2CAT" ) != 0) ||
|
|
(strstr ( progName, "zcat" ) != 0) ||
|
|
(strstr ( progName, "ZCAT" ) != 0) ) {
|
|
opMode = OM_UNZ;
|
|
srcMode = (numFileNames == 0) ? SM_I2O : SM_F2O;
|
|
}
|
|
|
|
|
|
/*-- Look at the flags. --*/
|
|
for (aa = argList; aa != NULL; aa = aa->link) {
|
|
if (ISFLAG("--")) break;
|
|
if (aa->name[0] == '-' && aa->name[1] != '-') {
|
|
for (j = 1; aa->name[j] != '\0'; j++) {
|
|
switch (aa->name[j]) {
|
|
case 'c': srcMode = SM_F2O; break;
|
|
case 'd': opMode = OM_UNZ; break;
|
|
case 'z': opMode = OM_Z; break;
|
|
case 'f': forceOverwrite = True; break;
|
|
case 't': opMode = OM_TEST; break;
|
|
case 'k': keepInputFiles = True; break;
|
|
case 's': smallMode = True; break;
|
|
case 'q': noisy = False; break;
|
|
case '1': blockSize100k = 1; break;
|
|
case '2': blockSize100k = 2; break;
|
|
case '3': blockSize100k = 3; break;
|
|
case '4': blockSize100k = 4; break;
|
|
case '5': blockSize100k = 5; break;
|
|
case '6': blockSize100k = 6; break;
|
|
case '7': blockSize100k = 7; break;
|
|
case '8': blockSize100k = 8; break;
|
|
case '9': blockSize100k = 9; break;
|
|
case 'V':
|
|
case 'L': license(); break;
|
|
case 'v': verbosity++; break;
|
|
case 'h': usage ( progName );
|
|
exit ( 0 );
|
|
break;
|
|
default: fprintf ( stderr, "%s: Bad flag `%s'\n",
|
|
progName, aa->name );
|
|
usage ( progName );
|
|
exit ( 1 );
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*-- And again ... --*/
|
|
for (aa = argList; aa != NULL; aa = aa->link) {
|
|
if (ISFLAG("--")) break;
|
|
if (ISFLAG("--stdout")) srcMode = SM_F2O; else
|
|
if (ISFLAG("--decompress")) opMode = OM_UNZ; else
|
|
if (ISFLAG("--compress")) opMode = OM_Z; else
|
|
if (ISFLAG("--force")) forceOverwrite = True; else
|
|
if (ISFLAG("--test")) opMode = OM_TEST; else
|
|
if (ISFLAG("--keep")) keepInputFiles = True; else
|
|
if (ISFLAG("--small")) smallMode = True; else
|
|
if (ISFLAG("--quiet")) noisy = False; else
|
|
if (ISFLAG("--version")) license(); else
|
|
if (ISFLAG("--license")) license(); else
|
|
if (ISFLAG("--exponential")) workFactor = 1; else
|
|
if (ISFLAG("--repetitive-best")) redundant(aa->name); else
|
|
if (ISFLAG("--repetitive-fast")) redundant(aa->name); else
|
|
if (ISFLAG("--fast")) blockSize100k = 1; else
|
|
if (ISFLAG("--best")) blockSize100k = 9; else
|
|
if (ISFLAG("--verbose")) verbosity++; else
|
|
if (ISFLAG("--help")) { usage ( progName ); exit ( 0 ); }
|
|
else
|
|
if (strncmp ( aa->name, "--", 2) == 0) {
|
|
fprintf ( stderr, "%s: Bad flag `%s'\n", progName, aa->name );
|
|
usage ( progName );
|
|
exit ( 1 );
|
|
}
|
|
}
|
|
|
|
if (verbosity > 4) verbosity = 4;
|
|
if (opMode == OM_Z && smallMode && blockSize100k > 2)
|
|
blockSize100k = 2;
|
|
|
|
if (opMode == OM_TEST && srcMode == SM_F2O) {
|
|
fprintf ( stderr, "%s: -c and -t cannot be used together.\n",
|
|
progName );
|
|
exit ( 1 );
|
|
}
|
|
|
|
if (srcMode == SM_F2O && numFileNames == 0)
|
|
srcMode = SM_I2O;
|
|
|
|
if (opMode != OM_Z) blockSize100k = 0;
|
|
|
|
if (srcMode == SM_F2F) {
|
|
signal (SIGINT, mySignalCatcher);
|
|
signal (SIGTERM, mySignalCatcher);
|
|
# if BZ_UNIX
|
|
signal (SIGHUP, mySignalCatcher);
|
|
# endif
|
|
}
|
|
|
|
if (opMode == OM_Z) {
|
|
if (srcMode == SM_I2O) {
|
|
compress ( NULL );
|
|
} else {
|
|
decode = True;
|
|
for (aa = argList; aa != NULL; aa = aa->link) {
|
|
if (ISFLAG("--")) { decode = False; continue; }
|
|
if (aa->name[0] == '-' && decode) continue;
|
|
numFilesProcessed++;
|
|
compress ( aa->name );
|
|
}
|
|
}
|
|
}
|
|
else
|
|
|
|
if (opMode == OM_UNZ) {
|
|
unzFailsExist = False;
|
|
if (srcMode == SM_I2O) {
|
|
uncompress ( NULL );
|
|
} else {
|
|
decode = True;
|
|
for (aa = argList; aa != NULL; aa = aa->link) {
|
|
if (ISFLAG("--")) { decode = False; continue; }
|
|
if (aa->name[0] == '-' && decode) continue;
|
|
numFilesProcessed++;
|
|
uncompress ( aa->name );
|
|
}
|
|
}
|
|
if (unzFailsExist) {
|
|
setExit(2);
|
|
exit(exitValue);
|
|
}
|
|
}
|
|
|
|
else {
|
|
testFailsExist = False;
|
|
if (srcMode == SM_I2O) {
|
|
testf ( NULL );
|
|
} else {
|
|
decode = True;
|
|
for (aa = argList; aa != NULL; aa = aa->link) {
|
|
if (ISFLAG("--")) { decode = False; continue; }
|
|
if (aa->name[0] == '-' && decode) continue;
|
|
numFilesProcessed++;
|
|
testf ( aa->name );
|
|
}
|
|
}
|
|
if (testFailsExist && noisy) {
|
|
fprintf ( stderr,
|
|
"\n"
|
|
"You can use the `bzip2recover' program to attempt to recover\n"
|
|
"data from undamaged sections of corrupted files.\n\n"
|
|
);
|
|
setExit(2);
|
|
exit(exitValue);
|
|
}
|
|
}
|
|
|
|
/* Free the argument list memory to mollify leak detectors
|
|
(eg) Purify, Checker. Serves no other useful purpose.
|
|
*/
|
|
aa = argList;
|
|
while (aa != NULL) {
|
|
Cell* aa2 = aa->link;
|
|
if (aa->name != NULL) free(aa->name);
|
|
free(aa);
|
|
aa = aa2;
|
|
}
|
|
|
|
return exitValue;
|
|
}
|
|
|
|
|
|
/*-----------------------------------------------------------*/
|
|
/*--- end bzip2.c ---*/
|
|
/*-----------------------------------------------------------*/
|