/*-----------------------------------------------------------*/ /*--- A block-sorting, lossless compressor bzip2.c ---*/ /*-----------------------------------------------------------*/ /*-- This file is a part of bzip2 and/or libbzip2, a program and library for lossless, block-sorting data compression. Copyright (C) 1996-1999 Julian R Seward. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 3. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 4. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. Julian Seward, Cambridge, UK. jseward@acm.org bzip2/libbzip2 version 0.9.5 of 24 May 1999 This program is based on (at least) the work of: Mike Burrows David Wheeler Peter Fenwick Alistair Moffat Radford Neal Ian H. Witten Robert Sedgewick Jon L. Bentley For more information on these sources, see the manual. --*/ /*----------------------------------------------------*/ /*--- IMPORTANT ---*/ /*----------------------------------------------------*/ /*-- WARNING: This program and library (attempts to) compress data by performing several non-trivial transformations on it. Unless you are 100% familiar with *all* the algorithms contained herein, and with the consequences of modifying them, you should NOT meddle with the compression or decompression machinery. Incorrect changes can and very likely *will* lead to disasterous loss of data. DISCLAIMER: I TAKE NO RESPONSIBILITY FOR ANY LOSS OF DATA ARISING FROM THE USE OF THIS PROGRAM, HOWSOEVER CAUSED. Every compression of a file implies an assumption that the compressed file can be decompressed to reproduce the original. Great efforts in design, coding and testing have been made to ensure that this program works correctly. However, the complexity of the algorithms, and, in particular, the presence of various special cases in the code which occur with very low but non-zero probability make it impossible to rule out the possibility of bugs remaining in the program. DO NOT COMPRESS ANY DATA WITH THIS PROGRAM AND/OR LIBRARY UNLESS YOU ARE PREPARED TO ACCEPT THE POSSIBILITY, HOWEVER SMALL, THAT THE DATA WILL NOT BE RECOVERABLE. That is not to say this program is inherently unreliable. Indeed, I very much hope the opposite is true. bzip2/libbzip2 has been carefully constructed and extensively tested. PATENTS: To the best of my knowledge, bzip2/libbzip2 does not use any patented algorithms. However, I do not have the resources available to carry out a full patent search. Therefore I cannot give any guarantee of the above statement. --*/ /*----------------------------------------------------*/ /*--- and now for something much more pleasant :-) ---*/ /*----------------------------------------------------*/ /*---------------------------------------------*/ /*-- Place a 1 beside your platform, and 0 elsewhere. --*/ /*-- Generic 32-bit Unix. Also works on 64-bit Unix boxes. --*/ #define BZ_UNIX 1 /*-- Win32, as seen by Jacob Navia's excellent port of (Chris Fraser & David Hanson)'s excellent lcc compiler. --*/ #define BZ_LCCWIN32 0 #if defined(_WIN32) && !defined(__CYGWIN32__) #undef BZ_LCCWIN32 #define BZ_LCCWIN32 1 #undef BZ_UNIX #define BZ_UNIX 0 #endif /*---------------------------------------------*/ /*-- Some stuff for all platforms. --*/ #include #include #include #include #include #include #include #include "bzlib.h" #define ERROR_IF_EOF(i) { if ((i) == EOF) ioError(); } #define ERROR_IF_NOT_ZERO(i) { if ((i) != 0) ioError(); } #define ERROR_IF_MINUS_ONE(i) { if ((i) == (-1)) ioError(); } /*---------------------------------------------*/ /*-- Platform-specific stuff. --*/ #if BZ_UNIX # include # include # include # include # include # define PATH_SEP '/' # define MY_LSTAT lstat # define MY_S_IFREG S_ISREG # define MY_STAT stat # define APPEND_FILESPEC(root, name) \ root=snocString((root), (name)) # define APPEND_FLAG(root, name) \ root=snocString((root), (name)) # define SET_BINARY_MODE(fd) /**/ # ifdef __GNUC__ # define NORETURN __attribute__ ((noreturn)) # else # define NORETURN /**/ # endif # ifdef __DJGPP__ # include # include # undef MY_LSTAT # define MY_LSTAT stat # undef SET_BINARY_MODE # define SET_BINARY_MODE(fd) \ do { \ int retVal = setmode ( fileno ( fd ), \ O_BINARY ); \ ERROR_IF_MINUS_ONE ( retVal ); \ } while ( 0 ) # endif #endif #if BZ_LCCWIN32 # include # include # include # define NORETURN /**/ # define PATH_SEP '\\' # define MY_LSTAT _stat # define MY_STAT _stat # define MY_S_IFREG(x) ((x) & _S_IFREG) # define APPEND_FLAG(root, name) \ root=snocString((root), (name)) # if 0 /*-- lcc-win32 seems to expand wildcards itself --*/ # define APPEND_FILESPEC(root, spec) \ do { \ if ((spec)[0] == '-') { \ root = snocString((root), (spec)); \ } else { \ struct _finddata_t c_file; \ long hFile; \ hFile = _findfirst((spec), &c_file); \ if ( hFile == -1L ) { \ root = snocString ((root), (spec)); \ } else { \ int anInt = 0; \ while ( anInt == 0 ) { \ root = snocString((root), \ &c_file.name[0]); \ anInt = _findnext(hFile, &c_file); \ } \ } \ } \ } while ( 0 ) # else # define APPEND_FILESPEC(root, name) \ root = snocString ((root), (name)) # endif # define SET_BINARY_MODE(fd) \ do { \ int retVal = setmode ( fileno ( fd ), \ O_BINARY ); \ ERROR_IF_MINUS_ONE ( retVal ); \ } while ( 0 ) #endif /*---------------------------------------------*/ /*-- Some more stuff for all platforms :-) --*/ typedef char Char; typedef unsigned char Bool; typedef unsigned char UChar; typedef int Int32; typedef unsigned int UInt32; typedef short Int16; typedef unsigned short UInt16; #define True ((Bool)1) #define False ((Bool)0) /*-- IntNative is your platform's `native' int size. Only here to avoid probs with 64-bit platforms. --*/ typedef int IntNative; /*---------------------------------------------------*/ /*--- Misc (file handling) data decls ---*/ /*---------------------------------------------------*/ Int32 verbosity; Bool keepInputFiles, smallMode; Bool forceOverwrite, testFailsExist, noisy; Int32 numFileNames, numFilesProcessed, blockSize100k; /*-- source modes; F==file, I==stdin, O==stdout --*/ #define SM_I2O 1 #define SM_F2O 2 #define SM_F2F 3 /*-- operation modes --*/ #define OM_Z 1 #define OM_UNZ 2 #define OM_TEST 3 Int32 opMode; Int32 srcMode; #define FILE_NAME_LEN 1034 Int32 longestFileName; Char inName [FILE_NAME_LEN]; Char outName[FILE_NAME_LEN]; Char tmpName[FILE_NAME_LEN]; Char *progName; Char progNameReally[FILE_NAME_LEN]; FILE *outputHandleJustInCase; Int32 workFactor; void panic ( Char* ) NORETURN; void ioError ( void ) NORETURN; void outOfMemory ( void ) NORETURN; void blockOverrun ( void ) NORETURN; void badBlockHeader ( void ) NORETURN; void badBGLengths ( void ) NORETURN; void crcError ( void ) NORETURN; void bitStreamEOF ( void ) NORETURN; void cleanUpAndFail ( Int32 ) NORETURN; void compressedStreamEOF ( void ) NORETURN; void copyFileName ( Char*, Char* ); void* myMalloc ( Int32 ); /*---------------------------------------------------*/ /*--- Processing of complete files and streams ---*/ /*---------------------------------------------------*/ /*---------------------------------------------*/ Bool myfeof ( FILE* f ) { Int32 c = fgetc ( f ); if (c == EOF) return True; ungetc ( c, f ); return False; } /*---------------------------------------------*/ void compressStream ( FILE *stream, FILE *zStream ) { BZFILE* bzf = NULL; UChar ibuf[5000]; Int32 nIbuf; UInt32 nbytes_in, nbytes_out; Int32 bzerr, bzerr_dummy, ret; SET_BINARY_MODE(stream); SET_BINARY_MODE(zStream); if (ferror(stream)) goto errhandler_io; if (ferror(zStream)) goto errhandler_io; bzf = bzWriteOpen ( &bzerr, zStream, blockSize100k, verbosity, workFactor ); if (bzerr != BZ_OK) goto errhandler; if (verbosity >= 2) fprintf ( stderr, "\n" ); while (True) { if (myfeof(stream)) break; nIbuf = fread ( ibuf, sizeof(UChar), 5000, stream ); if (ferror(stream)) goto errhandler_io; if (nIbuf > 0) bzWrite ( &bzerr, bzf, (void*)ibuf, nIbuf ); if (bzerr != BZ_OK) goto errhandler; } bzWriteClose ( &bzerr, bzf, 0, &nbytes_in, &nbytes_out ); if (bzerr != BZ_OK) goto errhandler; if (ferror(zStream)) goto errhandler_io; ret = fflush ( zStream ); if (ret == EOF) goto errhandler_io; if (zStream != stdout) { ret = fclose ( zStream ); if (ret == EOF) goto errhandler_io; } if (ferror(stream)) goto errhandler_io; ret = fclose ( stream ); if (ret == EOF) goto errhandler_io; if (nbytes_in == 0) nbytes_in = 1; if (verbosity >= 1) fprintf ( stderr, "%6.3f:1, %6.3f bits/byte, " "%5.2f%% saved, %d in, %d out.\n", (float)nbytes_in / (float)nbytes_out, (8.0 * (float)nbytes_out) / (float)nbytes_in, 100.0 * (1.0 - (float)nbytes_out / (float)nbytes_in), nbytes_in, nbytes_out ); return; errhandler: bzWriteClose ( &bzerr_dummy, bzf, 1, &nbytes_in, &nbytes_out ); switch (bzerr) { case BZ_MEM_ERROR: outOfMemory (); case BZ_IO_ERROR: errhandler_io: ioError(); break; default: panic ( "compress:unexpected error" ); } panic ( "compress:end" ); /*notreached*/ } /*---------------------------------------------*/ Bool uncompressStream ( FILE *zStream, FILE *stream ) { BZFILE* bzf = NULL; Int32 bzerr, bzerr_dummy, ret, nread, streamNo, i; UChar obuf[5000]; UChar unused[BZ_MAX_UNUSED]; Int32 nUnused; UChar* unusedTmp; nUnused = 0; streamNo = 0; SET_BINARY_MODE(stream); SET_BINARY_MODE(zStream); if (ferror(stream)) goto errhandler_io; if (ferror(zStream)) goto errhandler_io; while (True) { bzf = bzReadOpen ( &bzerr, zStream, verbosity, (int)smallMode, unused, nUnused ); if (bzf == NULL || bzerr != BZ_OK) goto errhandler; streamNo++; while (bzerr == BZ_OK) { nread = bzRead ( &bzerr, bzf, obuf, 5000 ); if (bzerr == BZ_DATA_ERROR_MAGIC) goto errhandler; if ((bzerr == BZ_OK || bzerr == BZ_STREAM_END) && nread > 0) fwrite ( obuf, sizeof(UChar), nread, stream ); if (ferror(stream)) goto errhandler_io; } if (bzerr != BZ_STREAM_END) goto errhandler; bzReadGetUnused ( &bzerr, bzf, (void**)(&unusedTmp), &nUnused ); if (bzerr != BZ_OK) panic ( "decompress:bzReadGetUnused" ); for (i = 0; i < nUnused; i++) unused[i] = unusedTmp[i]; bzReadClose ( &bzerr, bzf ); if (bzerr != BZ_OK) panic ( "decompress:bzReadGetUnused" ); if (nUnused == 0 && myfeof(zStream)) break; } if (ferror(zStream)) goto errhandler_io; 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 ); if (ret == EOF) goto errhandler_io; } if (verbosity >= 2) fprintf ( stderr, "\n " ); return True; errhandler: bzReadClose ( &bzerr_dummy, bzf ); switch (bzerr) { 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 (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*/ } /*---------------------------------------------*/ 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; UChar* unusedTmp; nUnused = 0; streamNo = 0; SET_BINARY_MODE(zStream); if (ferror(zStream)) goto errhandler_io; while (True) { bzf = bzReadOpen ( &bzerr, zStream, verbosity, (int)smallMode, unused, nUnused ); if (bzf == NULL || bzerr != BZ_OK) goto errhandler; streamNo++; while (bzerr == BZ_OK) { nread = bzRead ( &bzerr, bzf, obuf, 5000 ); if (bzerr == BZ_DATA_ERROR_MAGIC) goto errhandler; } if (bzerr != BZ_STREAM_END) goto errhandler; bzReadGetUnused ( &bzerr, bzf, (void**)(&unusedTmp), &nUnused ); if (bzerr != BZ_OK) panic ( "test:bzReadGetUnused" ); for (i = 0; i < nUnused; i++) unused[i] = unusedTmp[i]; 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: bzReadClose ( &bzerr_dummy, bzf ); if (verbosity == 0) fprintf ( stderr, "%s: %s: ", progName, inName ); switch (bzerr) { 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 (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 ---*/ /*---------------------------------------------------*/ /*---------------------------------------------*/ 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" ); } /*---------------------------------------------*/ void showFileNames ( void ) { if (noisy) fprintf ( stderr, "\tInput file = %s, output file = %s\n", inName, outName ); } /*---------------------------------------------*/ void cleanUpAndFail ( Int32 ec ) { IntNative retVal; if ( srcMode == SM_F2F && opMode != OM_TEST ) { 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 ); } if (noisy && numFileNames > 0 && numFilesProcessed < numFileNames) { fprintf ( stderr, "%s: WARNING: some files have not been processed:\n" "\t%d specified on command line, %d not processed yet.\n\n", progName, numFileNames, numFileNames - numFilesProcessed ); } exit ( ec ); } /*---------------------------------------------*/ void panic ( 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@acm.org\n", progName, s ); showFileNames(); cleanUpAndFail( 3 ); } /*---------------------------------------------*/ void crcError ( void ) { fprintf ( stderr, "\n%s: Data integrity error when decompressing.\n", progName ); showFileNames(); cadvise(); cleanUpAndFail( 2 ); } /*---------------------------------------------*/ void compressedStreamEOF ( void ) { 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 ); } /*---------------------------------------------*/ void ioError ( void ) { fprintf ( stderr, "\n%s: I/O or other error, bailing out. Possible reason follows.\n", progName ); perror ( progName ); showFileNames(); cleanUpAndFail( 1 ); } /*---------------------------------------------*/ void mySignalCatcher ( IntNative n ) { fprintf ( stderr, "\n%s: Control-C or similar caught, quitting.\n", progName ); cleanUpAndFail(1); } /*---------------------------------------------*/ void mySIGSEGVorSIGBUScatcher ( IntNative n ) { if (opMode == OM_Z) fprintf ( stderr, "\n%s: Caught a SIGSEGV or SIGBUS whilst compressing,\n" "\twhich probably indicates a bug in bzip2. Please\n" "\treport it to me at: jseward@acm.org\n", progName ); else fprintf ( stderr, "\n%s: Caught a SIGSEGV or SIGBUS whilst decompressing,\n" "\twhich probably indicates that the compressed data\n" "\tis corrupted.\n", progName ); showFileNames(); if (opMode == OM_Z) cleanUpAndFail( 3 ); else { cadvise(); cleanUpAndFail( 2 ); } } /*---------------------------------------------*/ void outOfMemory ( void ) { fprintf ( stderr, "\n%s: couldn't allocate enough memory\n", progName ); showFileNames(); cleanUpAndFail(1); } /*---------------------------------------------------*/ /*--- The main driver machinery ---*/ /*---------------------------------------------------*/ /*---------------------------------------------*/ void pad ( Char *s ) { Int32 i; if ( (Int32)strlen(s) >= longestFileName ) return; for (i = 1; i <= longestFileName - (Int32)strlen(s); i++) fprintf ( stderr, " " ); } /*---------------------------------------------*/ void copyFileName ( Char* to, 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 ); exit(1); } strncpy(to,from,FILE_NAME_LEN-10); to[FILE_NAME_LEN-10]='\0'; } /*---------------------------------------------*/ Bool fileExists ( Char* name ) { FILE *tmp = fopen ( name, "rb" ); Bool exists = (tmp != NULL); if (tmp != NULL) fclose ( tmp ); return exists; } /*---------------------------------------------*/ /*-- if in doubt, return True --*/ Bool notAStandardFile ( Char* name ) { IntNative i; struct MY_STAT statBuf; i = MY_LSTAT ( name, &statBuf ); if (i != 0) return True; if (MY_S_IFREG(statBuf.st_mode)) return False; return True; } /*---------------------------------------------*/ /*-- rac 11/21/98 see if file has hard links to it --*/ 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); } /*---------------------------------------------*/ void copyDatePermissionsAndOwner ( Char *srcName, Char *dstName ) { #if BZ_UNIX IntNative retVal; struct MY_STAT statBuf; struct utimbuf uTimBuf; retVal = MY_LSTAT ( srcName, &statBuf ); ERROR_IF_NOT_ZERO ( retVal ); uTimBuf.actime = statBuf.st_atime; uTimBuf.modtime = statBuf.st_mtime; retVal = chmod ( dstName, statBuf.st_mode ); ERROR_IF_NOT_ZERO ( retVal ); retVal = utime ( dstName, &uTimBuf ); ERROR_IF_NOT_ZERO ( retVal ); retVal = chown ( dstName, statBuf.st_uid, statBuf.st_gid ); /* chown() will in many cases return with EPERM, which can be safely ignored. */ #endif } /*---------------------------------------------*/ void setInterimPermissions ( Char *dstName ) { #if BZ_UNIX IntNative retVal; retVal = chmod ( dstName, S_IRUSR | S_IWUSR ); ERROR_IF_NOT_ZERO ( retVal ); #endif } /*---------------------------------------------*/ Bool containsDubiousChars ( Char* name ) { Bool cdc = False; for (; *name != '\0'; name++) if (*name == '?' || *name == '*') cdc = True; return cdc; } /*---------------------------------------------*/ #define BZ_N_SUFFIX_PAIRS 4 Char* zSuffix[BZ_N_SUFFIX_PAIRS] = { ".bz2", ".bz", ".tbz2", ".tbz" }; Char* unzSuffix[BZ_N_SUFFIX_PAIRS] = { "", "", ".tar", ".tar" }; Bool hasSuffix ( Char* s, 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; } Bool mapSuffix ( Char* name, Char* oldSuffix, Char* newSuffix ) { if (!hasSuffix(name,oldSuffix)) return False; name[strlen(name)-strlen(oldSuffix)] = 0; strcat ( name, newSuffix ); return True; } /*---------------------------------------------*/ void compress ( Char *name ) { FILE *inStr; FILE *outStr; Int32 n, i; 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 ); return; } if ( srcMode != SM_I2O && !fileExists ( inName ) ) { fprintf ( stderr, "%s: Can't open input file %s: %s.\n", progName, inName, strerror(errno) ); 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] ); return; } } if ( srcMode == SM_F2F && !forceOverwrite && notAStandardFile ( inName )) { if (noisy) fprintf ( stderr, "%s: Input file %s is not a normal file.\n", progName, inName ); return; } if ( srcMode == SM_F2F && !forceOverwrite && fileExists ( outName ) ) { fprintf ( stderr, "%s: Output file %s already exists.\n", progName, outName ); 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" : "" ); return; } 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 ); 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 ); return; }; if ( inStr == NULL ) { fprintf ( stderr, "%s: Can't open input file %s: %s.\n", progName, inName, strerror(errno) ); return; }; break; case SM_F2F: inStr = fopen ( inName, "rb" ); outStr = fopen ( 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 ); return; } if ( inStr == NULL ) { fprintf ( stderr, "%s: Can't open input file %s: %s.\n", progName, inName, strerror(errno) ); if ( outStr != NULL ) fclose ( outStr ); return; }; setInterimPermissions ( outName ); 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; compressStream ( inStr, outStr ); outputHandleJustInCase = NULL; /*--- If there was an I/O error, we won't get here. ---*/ if ( srcMode == SM_F2F ) { copyDatePermissionsAndOwner ( inName, outName ); if ( !keepInputFiles ) { IntNative retVal = remove ( inName ); ERROR_IF_NOT_ZERO ( retVal ); } } } /*---------------------------------------------*/ void uncompress ( Char *name ) { FILE *inStr; FILE *outStr; Int32 n, i; Bool magicNumberOK; Bool cantGuess; 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 ); return; } if ( srcMode != SM_I2O && !fileExists ( inName ) ) { fprintf ( stderr, "%s: Can't open input file %s: %s.\n", progName, inName, strerror(errno) ); return; } if ( srcMode == SM_F2F && !forceOverwrite && notAStandardFile ( inName )) { if (noisy) fprintf ( stderr, "%s: Input file %s is not a normal file.\n", progName, inName ); 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 && !forceOverwrite && fileExists ( outName ) ) { fprintf ( stderr, "%s: Output file %s already exists.\n", progName, outName ); 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" : "" ); return; } 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 ); 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 ); return; }; break; case SM_F2F: inStr = fopen ( inName, "rb" ); outStr = fopen ( 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 ); return; } if ( inStr == NULL ) { fprintf ( stderr, "%s: Can't open input file %s: %s.\n", progName, inName, strerror(errno) ); if ( outStr != NULL ) fclose ( outStr ); return; }; setInterimPermissions ( outName ); 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; magicNumberOK = uncompressStream ( inStr, outStr ); outputHandleJustInCase = NULL; /*--- If there was an I/O error, we won't get here. ---*/ if ( magicNumberOK ) { if ( srcMode == SM_F2F ) { copyDatePermissionsAndOwner ( inName, outName ); if ( !keepInputFiles ) { IntNative retVal = remove ( inName ); ERROR_IF_NOT_ZERO ( retVal ); } } } else { if ( srcMode == SM_F2F ) { IntNative retVal = remove ( outName ); ERROR_IF_NOT_ZERO ( retVal ); } } if ( magicNumberOK ) { if (verbosity >= 1) fprintf ( stderr, "done\n" ); } else { if (verbosity >= 1) fprintf ( stderr, "not a bzip2 file.\n" ); else fprintf ( stderr, "%s: %s is not a bzip2 file.\n", progName, inName ); } } /*---------------------------------------------*/ void testf ( Char *name ) { FILE *inStr; Bool allOK; 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 ); return; } if ( srcMode != SM_I2O && !fileExists ( inName ) ) { fprintf ( stderr, "%s: Can't open input %s: %s.\n", progName, inName, strerror(errno) ); 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 ); 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) ); 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. ---*/ allOK = testStream ( inStr ); if (allOK && verbosity >= 1) fprintf ( stderr, "ok\n" ); if (!allOK) testFailsExist = True; } /*---------------------------------------------*/ void license ( void ) { fprintf ( stderr, "bzip2, a block-sorting file compressor. " "Version 0.9.5d, 4-Sept-99.\n" " \n" " Copyright (C) 1996, 1997, 1998, 1999 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 bzip2-0.9.5 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" ); } /*---------------------------------------------*/ void usage ( Char *fullProgName ) { fprintf ( stderr, "bzip2, a block-sorting file compressor. " "Version 0.9.5d, 4-Sept-99.\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" "\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 , fullProgName ); } /*---------------------------------------------*/ 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; /*---------------------------------------------*/ void *myMalloc ( Int32 n ) { void* p; p = malloc ( (size_t)n ); if (p == NULL) outOfMemory (); return p; } /*---------------------------------------------*/ Cell *mkCell ( void ) { Cell *c; c = (Cell*) myMalloc ( sizeof ( Cell ) ); c->name = NULL; c->link = NULL; return c; } /*---------------------------------------------*/ 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; } } /*---------------------------------------------*/ void addFlagsFromEnvVar ( Cell** argList, 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) { 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" ); exit(3); } /*-- Initialise --*/ outputHandleJustInCase = NULL; smallMode = False; keepInputFiles = False; forceOverwrite = False; noisy = True; verbosity = 0; blockSize100k = 9; testFailsExist = False; numFileNames = 0; numFilesProcessed = 0; workFactor = 30; i = j = 0; /* avoid bogus warning from egcs-1.1.X */ /*-- Set up signal handlers for mem access errors --*/ signal (SIGSEGV, mySIGSEGVorSIGBUScatcher); #if BZ_UNIX #ifndef __DJGPP__ signal (SIGBUS, mySIGSEGVorSIGBUScatcher); #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("--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) { 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 ); } } } 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" ); exit(2); } } /* 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) free(aa->name); free(aa); aa = aa2; } return 0; } /*-----------------------------------------------------------*/ /*--- end bzip2.c ---*/ /*-----------------------------------------------------------*/