"Fossies" - the Fresh Open Source Software Archive

Member "file-5.35/magic/Magdir/compress" (1 Sep 2018, 10625 Bytes) of package /linux/misc/file-5.35.tar.gz:


As a special service "Fossies" has tried to format the requested text file into HTML format (style: standard) with prefixed line numbers. Alternatively you can here view or download the uninterpreted source code file. See also the latest Fossies "Diffs" side-by-side code changes report for "compress": 5.34_vs_5.35.

    1 #------------------------------------------------------------------------------
    2 # $File: compress,v 1.73 2018/09/01 13:52:39 christos Exp $
    3 # compress:  file(1) magic for pure-compression formats (no archives)
    4 #
    5 # compress, gzip, pack, compact, huf, squeeze, crunch, freeze, yabba, etc.
    6 #
    7 # Formats for various forms of compressed data
    8 # Formats for "compress" proper have been moved into "compress.c",
    9 # because it tries to uncompress it to figure out what's inside.
   10 
   11 # standard unix compress
   12 0	string		\037\235	compress'd data
   13 !:mime	application/x-compress
   14 !:apple	LZIVZIVU
   15 >2	byte&0x80	>0		block compressed
   16 >2	byte&0x1f	x		%d bits
   17 
   18 # gzip (GNU zip, not to be confused with Info-ZIP or PKWARE zip archiver)
   19 #   Edited by Chris Chittleborough <cchittleborough@yahoo.com.au>, March 2002
   20 #	* Original filename is only at offset 10 if "extra field" absent
   21 #	* Produce shorter output - notably, only report compression methods
   22 #         other than 8 ("deflate", the only method defined in RFC 1952).
   23 0       string          \037\213        gzip compressed data
   24 !:mime	application/x-gzip
   25 !:strength * 2
   26 >2	byte		<8		\b, reserved method
   27 >2	byte		>8		\b, unknown method
   28 >3	byte		&0x01		\b, ASCII
   29 >3	byte		&0x02		\b, has CRC
   30 >3	byte		&0x04		\b, extra field
   31 >3	byte&0xC	=0x08
   32 >>10	string		x		\b, was "%s"
   33 >3	byte		&0x10		\b, has comment
   34 >3	byte		&0x20		\b, encrypted
   35 >4	ledate		>0		\b, last modified: %s
   36 >8	byte		2		\b, max compression
   37 >8	byte		4		\b, max speed
   38 >9	byte		=0x00		\b, from FAT filesystem (MS-DOS, OS/2, NT)
   39 >9	byte		=0x01		\b, from Amiga
   40 >9	byte		=0x02		\b, from VMS
   41 >9	byte		=0x03		\b, from Unix
   42 >9	byte		=0x04		\b, from VM/CMS
   43 >9	byte		=0x05		\b, from Atari
   44 >9	byte		=0x06		\b, from HPFS filesystem (OS/2, NT)
   45 >9	byte		=0x07		\b, from MacOS
   46 >9	byte		=0x08		\b, from Z-System
   47 >9	byte		=0x09		\b, from CP/M
   48 >9	byte		=0x0A		\b, from TOPS/20
   49 >9	byte		=0x0B		\b, from NTFS filesystem (NT)
   50 >9	byte		=0x0C		\b, from QDOS
   51 >9	byte		=0x0D		\b, from Acorn RISCOS
   52 >-4	lelong		x		\b, original size %u
   53 
   54 # packed data, Huffman (minimum redundancy) codes on a byte-by-byte basis
   55 0	string		\037\036	packed data
   56 !:mime	application/octet-stream
   57 >2	belong		>1		\b, %d characters originally
   58 >2	belong		=1		\b, %d character originally
   59 #
   60 # This magic number is byte-order-independent.
   61 0	short		0x1f1f		old packed data
   62 !:mime	application/octet-stream
   63 
   64 # XXX - why *two* entries for "compacted data", one of which is
   65 # byte-order independent, and one of which is byte-order dependent?
   66 #
   67 0	short		0x1fff		compacted data
   68 !:mime	application/octet-stream
   69 # This string is valid for SunOS (BE) and a matching "short" is listed
   70 # in the Ultrix (LE) magic file.
   71 0	string		\377\037	compacted data
   72 !:mime	application/octet-stream
   73 0	short		0145405		huf output
   74 !:mime	application/octet-stream
   75 
   76 # bzip2
   77 0	string		BZh		bzip2 compressed data
   78 !:mime	application/x-bzip2
   79 >3	byte		>47		\b, block size = %c00k
   80 
   81 # bzip	a block-sorting file compressor
   82 #	by Julian Seward <sewardj@cs.man.ac.uk> and others
   83 0	string		BZ0		bzip compressed data
   84 !:mime	application/x-bzip
   85 >3	byte		>47		\b, block size = %c00k
   86 
   87 # lzip
   88 0	string		LZIP		lzip compressed data
   89 !:mime application/x-lzip
   90 >4	byte		x		\b, version: %d
   91 
   92 # squeeze and crunch
   93 # Michael Haardt <michael@cantor.informatik.rwth-aachen.de>
   94 0	beshort		0x76FF		squeezed data,
   95 >4	string		x		original name %s
   96 0	beshort		0x76FE		crunched data,
   97 >2	string		x		original name %s
   98 0	beshort		0x76FD		LZH compressed data,
   99 >2	string		x		original name %s
  100 
  101 # Freeze
  102 0	string		\037\237	frozen file 2.1
  103 0	string		\037\236	frozen file 1.0 (or gzip 0.5)
  104 
  105 # SCO compress -H (LZH)
  106 0	string		\037\240	SCO compress -H (LZH) data
  107 
  108 # European GSM 06.10 is a provisional standard for full-rate speech
  109 # transcoding, prI-ETS 300 036, which uses RPE/LTP (residual pulse
  110 # excitation/long term prediction) coding at 13 kbit/s.
  111 #
  112 # There's only a magic nibble (4 bits); that nibble repeats every 33
  113 # bytes.  This isn't suited for use, but maybe we can use it someday.
  114 #
  115 # This will cause very short GSM files to be declared as data and
  116 # mismatches to be declared as data too!
  117 #0	byte&0xF0	0xd0		data
  118 #>33	byte&0xF0	0xd0
  119 #>66	byte&0xF0	0xd0
  120 #>99	byte&0xF0	0xd0
  121 #>132	byte&0xF0	0xd0		GSM 06.10 compressed audio
  122 
  123 # lzop from <markus.oberhumer@jk.uni-linz.ac.at>
  124 0	string		\x89\x4c\x5a\x4f\x00\x0d\x0a\x1a\x0a	lzop compressed data
  125 >9	beshort		<0x0940
  126 >>9	byte&0xf0	=0x00		- version 0.
  127 >>9	beshort&0x0fff	x		\b%03x,
  128 >>13	byte		1		LZO1X-1,
  129 >>13	byte		2		LZO1X-1(15),
  130 >>13	byte		3		LZO1X-999,
  131 ## >>22	bedate		>0		last modified: %s,
  132 >>14	byte		=0x00		os: MS-DOS
  133 >>14	byte		=0x01		os: Amiga
  134 >>14	byte		=0x02		os: VMS
  135 >>14	byte		=0x03		os: Unix
  136 >>14	byte		=0x05		os: Atari
  137 >>14	byte		=0x06		os: OS/2
  138 >>14	byte		=0x07		os: MacOS
  139 >>14	byte		=0x0A		os: Tops/20
  140 >>14	byte		=0x0B		os: WinNT
  141 >>14	byte		=0x0E		os: Win32
  142 >9	beshort		>0x0939
  143 >>9	byte&0xf0	=0x00		- version 0.
  144 >>9	byte&0xf0	=0x10		- version 1.
  145 >>9	byte&0xf0	=0x20		- version 2.
  146 >>9	beshort&0x0fff	x		\b%03x,
  147 >>15	byte		1		LZO1X-1,
  148 >>15	byte		2		LZO1X-1(15),
  149 >>15	byte		3		LZO1X-999,
  150 ## >>25	bedate		>0		last modified: %s,
  151 >>17	byte		=0x00		os: MS-DOS
  152 >>17	byte		=0x01		os: Amiga
  153 >>17	byte		=0x02		os: VMS
  154 >>17	byte		=0x03		os: Unix
  155 >>17	byte		=0x05		os: Atari
  156 >>17	byte		=0x06		os: OS/2
  157 >>17	byte		=0x07		os: MacOS
  158 >>17	byte		=0x0A		os: Tops/20
  159 >>17	byte		=0x0B		os: WinNT
  160 >>17	byte		=0x0E		os: Win32
  161 
  162 # 4.3BSD-Quasijarus Strong Compression
  163 # http://minnie.tuhs.org/Quasijarus/compress.html
  164 0	string		\037\241	Quasijarus strong compressed data
  165 
  166 # From: Cory Dikkers <cdikkers@swbell.net>
  167 0	string		XPKF		Amiga xpkf.library compressed data
  168 0	string		PP11		Power Packer 1.1 compressed data
  169 0	string		PP20		Power Packer 2.0 compressed data,
  170 >4	belong		0x09090909	fast compression
  171 >4	belong		0x090A0A0A	mediocre compression
  172 >4	belong		0x090A0B0B	good compression
  173 >4	belong		0x090A0C0C	very good compression
  174 >4	belong		0x090A0C0D	best compression
  175 
  176 # 7-zip archiver, from Thomas Klausner (wiz@danbala.tuwien.ac.at)
  177 # http://www.7-zip.org or DOC/7zFormat.txt
  178 #
  179 0	string		7z\274\257\047\034	7-zip archive data,
  180 >6	byte		x			version %d
  181 >7	byte		x			\b.%d
  182 !:mime	application/x-7z-compressed
  183 !:ext 7z/cb7
  184 
  185 # Type: LZMA
  186 0	lelong&0xffffff	=0x5d
  187 >12	leshort		0xff			LZMA compressed data,
  188 !:mime	application/x-lzma
  189 >>5	lequad		=0xffffffffffffffff	streamed
  190 >>5	lequad		!0xffffffffffffffff	non-streamed, size %lld
  191 >12	leshort		0			LZMA compressed data,
  192 >>5	lequad		=0xffffffffffffffff	streamed
  193 >>5	lequad		!0xffffffffffffffff	non-streamed, size %lld
  194 
  195 # http://tukaani.org/xz/xz-file-format.txt
  196 0	ustring		\xFD7zXZ\x00		XZ compressed data
  197 !:strength * 2
  198 !:mime	application/x-xz
  199 
  200 # https://github.com/ckolivas/lrzip/blob/master/doc/magic.header.txt
  201 0	string		LRZI			LRZIP compressed data
  202 >4	byte		x			- version %d
  203 >5	byte		x			\b.%d
  204 !:mime	application/x-lrzip
  205 
  206 # http://fastcompression.blogspot.fi/2013/04/lz4-streaming-format-final.html
  207 0	lelong		0x184d2204	LZ4 compressed data (v1.4+)
  208 !:mime	application/x-lz4
  209 # Added by osm0sis@xda-developers.com
  210 0 	lelong		0x184c2103	LZ4 compressed data (v1.0-v1.3)
  211 !:mime	application/x-lz4
  212 0	lelong		0x184c2102	LZ4 compressed data (v0.1-v0.9)
  213 !:mime	application/x-lz4
  214 
  215 # Zstandard/LZ4 skippable frames
  216 # https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md
  217 0         lelong&0xFFFFFFF0  0x184D2A50
  218 >(4.l+8)  indirect	x
  219 
  220 # Zstandard Dictionary ID subroutine
  221 0     name        zstd-dictionary-id
  222 # Single Segment = True
  223 >0    byte        &0x20   \b, Dictionary ID:
  224 >>0   byte&0x03   0       None
  225 >>0   byte&0x03   1
  226 >>>1  byte        x       %u
  227 >>0   byte&0x03   2
  228 >>>1  leshort     x       %u
  229 >>0   byte&0x03   3
  230 >>>1  lelong      x       %u
  231 # Single Segment = False
  232 >0    byte        ^0x20   \b, Dictionary ID:
  233 >>0   byte&0x03   0       None
  234 >>0   byte&0x03   1
  235 >>>2  byte        x       %u
  236 >>0   byte&0x03   2
  237 >>>2  leshort     x       %u
  238 >>0   byte&0x03   3
  239 >>>2  lelong      x       %u
  240 
  241 # Zstandard compressed data
  242 # https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md
  243 0     lelong       0xFD2FB522  Zstandard compressed data (v0.2)
  244 !:mime  application/x-zstd
  245 0     lelong       0xFD2FB523  Zstandard compressed data (v0.3)
  246 !:mime  application/x-zstd
  247 0     lelong       0xFD2FB524  Zstandard compressed data (v0.4)
  248 !:mime  application/x-zstd
  249 0     lelong       0xFD2FB525  Zstandard compressed data (v0.5)
  250 !:mime  application/x-zstd
  251 0     lelong       0xFD2FB526  Zstandard compressed data (v0.6)
  252 !:mime  application/x-zstd
  253 0     lelong       0xFD2FB527  Zstandard compressed data (v0.7)
  254 !:mime  application/x-zstd
  255 >4    use          zstd-dictionary-id
  256 0     lelong       0xFD2FB528  Zstandard compressed data (v0.8+)
  257 !:mime  application/x-zstd
  258 >4    use          zstd-dictionary-id
  259 
  260 # https://github.com/facebook/zstd/blob/dev/zstd_compression_format.md
  261 0  lelong    0xEC30A437  Zstandard dictionary
  262 !:mime  application/x-zstd-dictionary
  263 >4 lelong    x           (ID %u)
  264 
  265 # AFX compressed files (Wolfram Kleff)
  266 2	string		-afx-		AFX compressed file data
  267 
  268 # Supplementary magic data for the file(1) command to support
  269 # rzip(1).  The format is described in magic(5).
  270 #
  271 # Copyright (C) 2003 by Andrew Tridgell.  You may do whatever you want with
  272 # this file.
  273 #
  274 0	string		RZIP		rzip compressed data
  275 >4	byte		x		- version %d
  276 >5	byte		x		\b.%d
  277 >6	belong		x		(%d bytes)
  278 
  279 0	string		ArC\x01		FreeArc archive <http://freearc.org>
  280 
  281 # Type:	DACT compressed files
  282 0	long	0x444354C3	DACT compressed data
  283 >4	byte	>-1		(version %i.
  284 >5	byte	>-1		%i.
  285 >6	byte	>-1		%i)
  286 >7	long	>0		, original size: %i bytes
  287 >15	long	>30		, block size: %i bytes
  288 
  289 # Valve Pack (VPK) files
  290 0	lelong	0x55aa1234	Valve Pak file
  291 >0x4	lelong	x		\b, version %u
  292 >0x8	lelong	x		\b, %u entries
  293 
  294 # Snappy framing format
  295 # http://code.google.com/p/snappy/source/browse/trunk/framing_format.txt
  296 0	string	\377\006\0\0sNaPpY	snappy framed data
  297 !:mime	application/x-snappy-framed
  298 
  299 # qpress, http://www.quicklz.com/
  300 0	string	qpress10	qpress compressed data
  301 !:mime	application/x-qpress
  302 
  303 # Zlib https://www.ietf.org/rfc/rfc6713.txt
  304 0	string/b	x
  305 >0	beshort%31	=0
  306 >>0	byte&0xf	=8
  307 >>>0	byte&0x80 	=0	zlib compressed data
  308 !:mime	application/zlib
  309 
  310 # BWC compression
  311 0	string		BWC
  312 >3	byte		0	BWC compressed data
  313 
  314 # UCL compression
  315 0	bequad		0x00e955434cff011a	UCL compressed data
  316 
  317 # Softlib archive
  318 0	string		SLIB	Softlib archive
  319 >4	leshort		x	\b, version %d
  320 >6	leshort		x	(contains %d files)
  321 
  322 # URL:  https://github.com/lzfse/lzfse/blob/master/src/lzfse_internal.h#L276
  323 # From: Eric Hall <eric.hall@darkart.com>
  324 0	string	bvx-	lzfse encoded, no compression
  325 0	string	bvx1	lzfse compressed, uncompressed tables
  326 0	string	bvx2	lzfse compressed, compressed tables
  327 0	string	bvxn	lzfse encoded, lzvn compressed