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git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3435 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
119 lines
4.6 KiB
XML
119 lines
4.6 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN" "http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../general.ent">
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%general-entities;
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]>
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<sect1 id="ch-system-bzip2" xreflabel="Bzip2">
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<title>Bzip2-&bzip2-version;</title>
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<?dbhtml filename="bzip2.html"?>
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<indexterm zone="ch-system-bzip2"><primary sortas="a-Bzip2">Bzip2</primary></indexterm>
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<para>The Bzip2 package contains programs for compressing and decompressing
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files. On text files they achieve a much better compression than the
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traditional <command>gzip</command>.</para>
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<screen>&buildtime; 0.1 SBU
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&diskspace; 3.0 MB</screen>
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<para>Bzip2 installation depends on: Bash, Binutils, Coreutils, Diffutils,
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GCC, Glibc, Make.</para>
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<sect2>
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<title>Installation of Bzip2</title>
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<para>Prepare Bzip2 for compilation with:</para>
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<screen><userinput>make -f Makefile-libbz2_so
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make clean</userinput></screen>
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<para>The <emphasis>-f</emphasis> flag will cause Bzip2 to be built
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using a different <filename>Makefile</filename> file, in this case the
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<filename>Makefile-libbz2_so</filename> file, which creates a dynamic
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<filename>libbz2.so</filename> library and links the Bzip2 utilities
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against it.</para>
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<para>Compile the package:</para>
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<screen><userinput>make</userinput></screen>
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<para>If you are reinstalling Bzip2, you need to do
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<userinput>rm -f /usr/bin/bz*</userinput> first, otherwise the following
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<command>make install</command> will fail.</para>
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<para>Install the programs:</para>
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<screen><userinput>make install</userinput></screen>
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<para>Now install the shared <command>bzip2</command> binary into the
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<filename class="directory">/bin</filename> directory, then make some
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necessary symbolic links, and clean up:</para>
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<screen><userinput>cp bzip2-shared /bin/bzip2
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cp -a libbz2.so* /lib
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ln -s ../../lib/libbz2.so.1.0 /usr/lib/libbz2.so
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rm /usr/bin/{bunzip2,bzcat,bzip2}
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mv /usr/bin/{bzip2recover,bzless,bzmore} /bin
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ln -s bzip2 /bin/bunzip2
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ln -s bzip2 /bin/bzcat</userinput></screen>
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</sect2>
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<sect2 id="contents-bzip2"><title>Contents of Bzip2</title>
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<para><emphasis>Installed programs</emphasis>: bunzip2 (link to bzip2), bzcat
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(link to bzip2), bzcmp, bzdiff, bzegrep, bzfgrep, bzgrep, bzip2, bzip2recover,
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bzless and bzmore</para>
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<para><emphasis>Installed libraries</emphasis>: libbz2.a, libbz2.so (link to
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libbz2.so.1.0), libbz2.so.1.0 (link to libbz2.so.&bzip2-version;) and
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libbz2.so.&bzip2-version;</para>
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</sect2>
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<sect2><title>Short descriptions</title>
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<indexterm zone="ch-system-bzip2 bunzip2"><primary sortas="b-bunzip2">bunzip2</primary></indexterm>
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<para id="bunzip2"><command>bunzip2</command> decompresses bzipped files.</para>
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<indexterm zone="ch-system-bzip2 bzcat"><primary sortas="b-bzcat">bzcat</primary></indexterm>
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<para id="bzcat"><command>bzcat</command> decompresses to standard output.</para>
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<indexterm zone="ch-system-bzip2 bzcmp"><primary sortas="b-bzcmp">bzcmp</primary></indexterm>
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<para id="bzcmp"><command>bzcmp</command> runs cmp on bzipped files.</para>
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<indexterm zone="ch-system-bzip2 bzdiff"><primary sortas="b-bzdiff">bzdiff</primary></indexterm>
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<para id="bzdiff"><command>bzdiff</command> runs diff on bzipped files.</para>
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<indexterm zone="ch-system-bzip2 bzgrep"><primary sortas="b-bzgrep">bzgrep</primary></indexterm>
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<para id="bzgrep"><command>bzgrep</command> and friends run grep on bzipped files.</para>
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<indexterm zone="ch-system-bzip2 bzip2"><primary sortas="b-bzip2">bzip2</primary></indexterm>
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<para id="bzip2"><command>bzip2</command> compresses files using the Burrows-Wheeler
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block sorting text compression algorithm with Huffman coding. The compression
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rate is generally considerably better than that achieved by more conventional
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compressors using LZ77/LZ78, like <command>gzip</command>.</para>
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<indexterm zone="ch-system-bzip2 bzip2recover"><primary sortas="b-bzip2recover">bzip2recover</primary></indexterm>
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<para id="bzip2recover"><command>bzip2recover</command> tries to recover data from damaged
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bzip2 files.</para>
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<indexterm zone="ch-system-bzip2 bzless"><primary sortas="b-bzless">bzless</primary></indexterm>
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<para id="bzless"><command>bzless</command> runs less on bzipped files.</para>
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<indexterm zone="ch-system-bzip2 bzmore"><primary sortas="b-bzmore">bzmore</primary></indexterm>
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<para id="bzmore"><command>bzmore</command> runs more on bzipped files.</para>
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<indexterm zone="ch-system-bzip2 libbz2"><primary sortas="c-libbz2*">libbz2*</primary></indexterm>
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<para id="libbz2"><command>libbz2*</command> is the library implementing lossless,
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block-sorting data compression, using the Burrows-Wheeler algorithm.</para>
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</sect2>
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</sect1>
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