| 1 | ###############################################################################
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| 2 | # Quick installation
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| 3 | ###############################################################################
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| 4 |
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| 5 | To build and install bzip into /usr/local, execute the following commands
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| 6 | as user bin:
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| 7 |
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| 8 | make
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| 9 | make install
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| 10 |
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| 11 | To install into another directory use:
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| 12 | make install PREFIX=<path>
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| 13 |
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| 14 | ###############################################################################
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| 15 | # bzip 1.0.3 for Minix
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| 16 | ###############################################################################
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| 17 | The text below is taken from the original README file. The original file is
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| 18 | available as README.ORIGINAL.
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| 19 |
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| 20 | This is the README for bzip2, a block-sorting file compressor, version
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| 21 | 1.0.3. This version is fully compatible with the previous public
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| 22 | releases, versions 0.1pl2, 0.9.0, 0.9.5, 1.0.0, 1.0.1 and 1.0.2.
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| 23 |
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| 24 | bzip2-1.0.3 is distributed under a BSD-style license. For details,
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| 25 | see the file LICENSE.
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| 26 |
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| 27 | Complete documentation is available in Postscript form (manual.ps),
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| 28 | PDF (manual.pdf) or html (manual.html). A plain-text version of the
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| 29 | manual page is available as bzip2.txt. A statement about Y2K issues
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| 30 | is now included in the file Y2K_INFO.
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| 31 |
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| 32 |
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| 33 | HOW TO BUILD -- MINIX
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| 34 |
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| 35 | Type `make'. This builds the library libbz2.a and then the
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| 36 | programs bzip2 and bzip2recover. Six self-tests are run.
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| 37 | If the self-tests complete ok, carry on to installation:
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| 38 |
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| 39 | To install in /usr/local/bin, /usr/local/lib, /usr/local/man and
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| 40 | /usr/local/include, type
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| 41 | make install
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| 42 | To install somewhere else, eg, /xxx/yyy/{bin,lib,man,include}, type
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| 43 | make install PREFIX=/xxx/yyy
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| 44 | If you are (justifiably) paranoid and want to see what 'make install'
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| 45 | is going to do, you can first do
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| 46 | make -n install or
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| 47 | make -n install PREFIX=/xxx/yyy respectively.
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| 48 | The -n instructs make to show the commands it would execute, but
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| 49 | not actually execute them.
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| 50 |
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| 51 | VALIDATION
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| 52 |
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| 53 | Correct operation, in the sense that a compressed file can always be
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| 54 | decompressed to reproduce the original, is obviously of paramount
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| 55 | importance. To validate bzip2, I used a modified version of Mark
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| 56 | Nelson's churn program. Churn is an automated test driver which
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| 57 | recursively traverses a directory structure, using bzip2 to compress
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| 58 | and then decompress each file it encounters, and checking that the
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| 59 | decompressed data is the same as the original.
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| 60 |
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| 61 |
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| 62 |
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| 63 | Please read and be aware of the following:
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| 64 |
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| 65 | WARNING:
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| 66 |
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| 67 | This program (attempts to) compress data by performing several
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| 68 | non-trivial transformations on it. Unless you are 100% familiar
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| 69 | with *all* the algorithms contained herein, and with the
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| 70 | consequences of modifying them, you should NOT meddle with the
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| 71 | compression or decompression machinery. Incorrect changes can and
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| 72 | very likely *will* lead to disastrous loss of data.
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| 73 |
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| 74 |
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| 75 | DISCLAIMER:
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| 76 |
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| 77 | I TAKE NO RESPONSIBILITY FOR ANY LOSS OF DATA ARISING FROM THE
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| 78 | USE OF THIS PROGRAM, HOWSOEVER CAUSED.
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| 79 |
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| 80 | Every compression of a file implies an assumption that the
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| 81 | compressed file can be decompressed to reproduce the original.
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| 82 | Great efforts in design, coding and testing have been made to
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| 83 | ensure that this program works correctly. However, the complexity
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| 84 | of the algorithms, and, in particular, the presence of various
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| 85 | special cases in the code which occur with very low but non-zero
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| 86 | probability make it impossible to rule out the possibility of bugs
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| 87 | remaining in the program. DO NOT COMPRESS ANY DATA WITH THIS
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| 88 | PROGRAM UNLESS YOU ARE PREPARED TO ACCEPT THE POSSIBILITY, HOWEVER
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| 89 | SMALL, THAT THE DATA WILL NOT BE RECOVERABLE.
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| 90 |
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| 91 | That is not to say this program is inherently unreliable. Indeed,
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| 92 | I very much hope the opposite is true. bzip2 has been carefully
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| 93 | constructed and extensively tested.
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| 94 |
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| 95 |
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| 96 | PATENTS:
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| 97 |
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| 98 | To the best of my knowledge, bzip2 does not use any patented
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| 99 | algorithms. However, I do not have the resources to carry out
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| 100 | a patent search. Therefore I cannot give any guarantee of the
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| 101 | above statement.
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| 102 |
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| 103 | End of legalities.
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| 104 |
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| 105 |
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| 106 | WHAT'S NEW IN 0.9.0 (as compared to 0.1pl2) ?
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| 107 |
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| 108 | * Approx 10% faster compression, 30% faster decompression
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| 109 | * -t (test mode) is a lot quicker
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| 110 | * Can decompress concatenated compressed files
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| 111 | * Programming interface, so programs can directly read/write .bz2 files
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| 112 | * Less restrictive (BSD-style) licensing
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| 113 | * Flag handling more compatible with GNU gzip
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| 114 | * Much more documentation, i.e., a proper user manual
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| 115 | * Hopefully, improved portability (at least of the library)
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| 116 |
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| 117 | WHAT'S NEW IN 0.9.5 ?
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| 118 |
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| 119 | * Compression speed is much less sensitive to the input
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| 120 | data than in previous versions. Specifically, the very
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| 121 | slow performance caused by repetitive data is fixed.
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| 122 | * Many small improvements in file and flag handling.
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| 123 | * A Y2K statement.
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| 124 |
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| 125 | WHAT'S NEW IN 1.0.0 ?
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| 126 |
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| 127 | See the CHANGES file.
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| 128 |
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| 129 | WHAT'S NEW IN 1.0.2 ?
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| 130 |
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| 131 | See the CHANGES file.
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| 132 |
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| 133 | WHAT'S NEW IN 1.0.3 ?
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| 134 |
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| 135 | See the CHANGES file.
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| 136 |
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| 137 |
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| 138 | I hope you find bzip2 useful. Feel free to contact me at
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| 139 | jseward@bzip.org
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| 140 | if you have any suggestions or queries. Many people mailed me with
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| 141 | comments, suggestions and patches after the releases of bzip-0.15,
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| 142 | bzip-0.21, and bzip2 versions 0.1pl2, 0.9.0, 0.9.5, 1.0.0, 1.0.1 and
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| 143 | 1.0.2, and the changes in bzip2 are largely a result of this feedback.
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| 144 | I thank you for your comments.
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| 145 |
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| 146 | At least for the time being, bzip2's "home" is (or can be reached via)
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| 147 | http://www.bzip.org
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| 148 |
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| 149 | Julian Seward
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| 150 | jseward@bzip.org
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| 151 |
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| 152 | Cambridge, UK.
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| 153 |
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| 154 | 18 July 1996 (version 0.15)
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| 155 | 25 August 1996 (version 0.21)
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| 156 | 7 August 1997 (bzip2, version 0.1)
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| 157 | 29 August 1997 (bzip2, version 0.1pl2)
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| 158 | 23 August 1998 (bzip2, version 0.9.0)
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| 159 | 8 June 1999 (bzip2, version 0.9.5)
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| 160 | 4 Sept 1999 (bzip2, version 0.9.5d)
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| 161 | 5 May 2000 (bzip2, version 1.0pre8)
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| 162 | 30 December 2001 (bzip2, version 1.0.2pre1)
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| 163 | 15 February 2005 (bzip2, version 1.0.3)
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| 164 |
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| 165 | ###############################################################################
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| 166 | # Changes to the source of version 1.0.3
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| 167 | ###############################################################################
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| 168 | - Changed default installation to /usr/local
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| 169 | - Adjusted Makefile to separate testing from building, to allow chmem in
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| 170 | between
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| 171 | - Adjusted invocation of ar, as Minix ar does not support -q, even though the
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| 172 | documentation says it does
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