[673b0d8] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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[1770019] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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[673b0d8] | 3 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 4 | %general-entities;
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| 5 | ]>
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[81fd230] | 6 | <sect1 id="ch-system-gzip" role="wrap">
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[673b0d8] | 7 | <title>Gzip-&gzip-version;</title>
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| 8 | <?dbhtml filename="gzip.html"?>
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| 9 |
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| 10 | <indexterm zone="ch-system-gzip"><primary sortas="a-Gzip">Gzip</primary></indexterm>
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[6370fa6] | 11 |
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[a001133] | 12 | <sect2 role="package"><title/>
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[81fd230] | 13 | <para>The Gzip package contains programs for compressing and decompressing
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| 14 | files.</para>
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[5888299] | 15 |
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[a001133] | 16 | <segmentedlist>
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| 17 | <segtitle>&buildtime;</segtitle>
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| 18 | <segtitle>&diskspace;</segtitle>
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[fc1024a] | 19 | <seglistitem><seg>0.1 SBU</seg><seg>2.2 MB</seg></seglistitem>
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[a001133] | 20 | </segmentedlist>
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[673b0d8] | 21 |
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[81fd230] | 22 | <segmentedlist>
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[45992ae] | 23 | <segtitle>&dependencies;</segtitle>
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[81fd230] | 24 | <seglistitem><seg>Bash, Binutils, Coreutils, Diffutils,
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| 25 | GCC, Glibc, Grep, Make, and Sed</seg></seglistitem>
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| 26 | </segmentedlist>
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[a001133] | 27 | </sect2>
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[3554fa3a] | 28 |
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[a001133] | 29 | <sect2 role="installation">
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[73aedd1d] | 30 | <title>Installation of Gzip</title>
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| 31 |
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[373a708] | 32 | <para>Gzip has 2 known security vulnerabilities. The following patch
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[fdcace3] | 33 | addresses both of them:</para>
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| 34 |
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| 35 | <screen><userinput>patch -Np1 -i ../gzip-&gzip-version;-security_fixes-1.patch</userinput></screen>
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| 36 |
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[73aedd1d] | 37 | <para>Prepare Gzip for compilation:</para>
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| 38 |
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| 39 | <screen><userinput>./configure --prefix=/usr</userinput></screen>
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| 40 |
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[81fd230] | 41 | <para>The <command>gzexe</command> script has the location of the
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| 42 | <command>gzip</command> binary hard-wired into it. Because the
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| 43 | location of the binary is changed later, the following command ensures
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| 44 | that the new location gets placed into the script:</para>
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[73aedd1d] | 45 |
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[2ec4b60] | 46 | <screen><userinput>sed -i 's@"BINDIR"@/bin@g' gzexe.in</userinput></screen>
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[73aedd1d] | 47 |
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| 48 | <para>Compile the package:</para>
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| 49 |
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| 50 | <screen><userinput>make</userinput></screen>
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| 51 |
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| 52 | <para>Install the package:</para>
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| 53 |
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| 54 | <screen><userinput>make install</userinput></screen>
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| 55 |
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[2b7de70] | 56 | <para>Move the <command>gzip</command> program to the <filename
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[373a708] | 57 | class="directory">/bin</filename> directory and create some commonly used
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| 58 | symlinks to it:</para>
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[73aedd1d] | 59 |
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| 60 | <screen><userinput>mv /usr/bin/gzip /bin
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| 61 | rm /usr/bin/{gunzip,zcat}
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| 62 | ln -s gzip /bin/gunzip
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| 63 | ln -s gzip /bin/zcat
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[2682464] | 64 | ln -s gzip /bin/compress
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[73aedd1d] | 65 | ln -s gunzip /bin/uncompress</userinput></screen>
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| 66 |
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| 67 | </sect2>
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[6370fa6] | 68 |
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[5888299] | 69 |
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[c6cb3aa] | 70 | <sect2 id="contents-gzip" role="content"><title>Contents of Gzip</title>
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[673b0d8] | 71 |
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[81fd230] | 72 | <segmentedlist>
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| 73 | <segtitle>Installed programs</segtitle>
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[2682464] | 74 | <seglistitem><seg>compress (link to gzip), gunzip (link to gzip), gzexe,
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[81fd230] | 75 | gzip, uncompress (link to gunzip), zcat (link to gzip), zcmp, zdiff,
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| 76 | zegrep, zfgrep, zforce, zgrep, zless, zmore, and znew</seg></seglistitem>
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| 77 | </segmentedlist>
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| 78 |
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| 79 | <variablelist><bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 80 | <?dbfo list-presentation="list"?>
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[8f97096] | 81 | <?dbhtml list-presentation="table"?>
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[81fd230] | 82 |
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[2682464] | 83 | <varlistentry id="compress">
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| 84 | <term><command>compress</command></term>
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| 85 | <listitem>
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[90b56f5] | 86 | <para>Compresses and decompresses files</para>
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[2682464] | 87 | <indexterm zone="ch-system-gzip compress"><primary sortas="b-compress">compress</primary></indexterm>
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| 88 | </listitem>
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| 89 | </varlistentry>
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| 90 |
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[81fd230] | 91 | <varlistentry id="gunzip">
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| 92 | <term><command>gunzip</command></term>
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| 93 | <listitem>
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| 94 | <para>Decompresses gzipped files</para>
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| 95 | <indexterm zone="ch-system-gzip gunzip"><primary sortas="b-gunzip">gunzip</primary></indexterm>
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| 96 | </listitem>
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| 97 | </varlistentry>
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| 98 |
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| 99 | <varlistentry id="gzexe">
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| 100 | <term><command>gzexe</command></term>
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| 101 | <listitem>
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[90b56f5] | 102 | <para>Creates self-decompressing executable files</para>
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[81fd230] | 103 | <indexterm zone="ch-system-gzip gzexe"><primary sortas="b-gzexe">gzexe</primary></indexterm>
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| 104 | </listitem>
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| 105 | </varlistentry>
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| 106 |
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| 107 | <varlistentry id="gzip">
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| 108 | <term><command>gzip</command></term>
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| 109 | <listitem>
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| 110 | <para>Compresses the given files using Lempel-Ziv (LZ77) coding</para>
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| 111 | <indexterm zone="ch-system-gzip gzip"><primary sortas="b-gzip">gzip</primary></indexterm>
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| 112 | </listitem>
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| 113 | </varlistentry>
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| 114 |
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| 115 | <varlistentry id="uncompress">
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| 116 | <term><command>uncompress</command></term>
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| 117 | <listitem>
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| 118 | <para>Decompresses compressed files</para>
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| 119 | <indexterm zone="ch-system-gzip uncompress"><primary sortas="b-uncompress">uncompress</primary></indexterm>
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| 120 | </listitem>
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| 121 | </varlistentry>
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| 122 |
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| 123 | <varlistentry id="zcat">
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| 124 | <term><command>zcat</command></term>
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| 125 | <listitem>
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| 126 | <para>Uncompresses the given gzipped files to standard output</para>
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| 127 | <indexterm zone="ch-system-gzip zcat"><primary sortas="b-zcat">zcat</primary></indexterm>
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| 128 | </listitem>
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| 129 | </varlistentry>
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| 130 |
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| 131 | <varlistentry id="zcmp">
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| 132 | <term><command>zcmp</command></term>
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| 133 | <listitem>
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| 134 | <para>Runs <command>cmp</command> on gzipped files</para>
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| 135 | <indexterm zone="ch-system-gzip zcmp"><primary sortas="b-zcmp">zcmp</primary></indexterm>
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| 136 | </listitem>
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| 137 | </varlistentry>
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| 138 |
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| 139 | <varlistentry id="zdiff">
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| 140 | <term><command>zdiff</command></term>
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| 141 | <listitem>
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| 142 | <para>Runs <command>diff</command> on gzipped files</para>
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| 143 | <indexterm zone="ch-system-gzip zdiff"><primary sortas="b-zdiff">zdiff</primary></indexterm>
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| 144 | </listitem>
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| 145 | </varlistentry>
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| 146 |
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| 147 | <varlistentry id="zegrep">
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| 148 | <term><command>zegrep</command></term>
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| 149 | <listitem>
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| 150 | <para>Runs <command>egrep</command> on gzipped files</para>
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| 151 | <indexterm zone="ch-system-gzip zegrep"><primary sortas="b-zegrep">zegrep</primary></indexterm>
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| 152 | </listitem>
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| 153 | </varlistentry>
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| 154 |
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| 155 | <varlistentry id="zfgrep">
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| 156 | <term><command>zfgrep</command></term>
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| 157 | <listitem>
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| 158 | <para>Runs <command>fgrep</command> on gzipped files</para>
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| 159 | <indexterm zone="ch-system-gzip zfgrep"><primary sortas="b-zfgrep">zfgrep</primary></indexterm>
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| 160 | </listitem>
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| 161 | </varlistentry>
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| 162 |
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| 163 | <varlistentry id="zforce">
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| 164 | <term><command>zforce</command></term>
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| 165 | <listitem>
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| 166 | <para>Forces a <filename class="extension">.gz</filename> extension on all given files
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| 167 | that are gzipped files, so that <command>gzip</command> will not compress them again; this can be
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| 168 | useful when file names were truncated during a file transfer</para>
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| 169 | <indexterm zone="ch-system-gzip zforce"><primary sortas="b-zforce">zforce</primary></indexterm>
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| 170 | </listitem>
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| 171 | </varlistentry>
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| 172 |
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| 173 | <varlistentry id="zgrep">
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| 174 | <term><command>zgrep</command></term>
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| 175 | <listitem>
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| 176 | <para>Runs <command>grep</command> on gzipped files</para>
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| 177 | <indexterm zone="ch-system-gzip zgrep"><primary sortas="b-zgrep">zgrep</primary></indexterm>
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| 178 | </listitem>
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| 179 | </varlistentry>
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| 180 |
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| 181 | <varlistentry id="zless">
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| 182 | <term><command>zless</command></term>
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| 183 | <listitem>
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| 184 | <para>Runs <command>less</command> on gzipped files</para>
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| 185 | <indexterm zone="ch-system-gzip zless"><primary sortas="b-zless">zless</primary></indexterm>
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| 186 | </listitem>
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| 187 | </varlistentry>
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| 188 |
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| 189 | <varlistentry id="zmore">
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| 190 | <term><command>zmore</command></term>
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| 191 | <listitem>
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| 192 | <para>Runs <command>more</command> on gzipped files</para>
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| 193 | <indexterm zone="ch-system-gzip zmore"><primary sortas="b-zmore">zmore</primary></indexterm>
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| 194 | </listitem>
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| 195 | </varlistentry>
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| 196 |
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| 197 | <varlistentry id="znew">
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| 198 | <term><command>znew</command></term>
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| 199 | <listitem>
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| 200 | <para>Re-compresses files from <command>compress</command> format to
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| 201 | <command>gzip</command> format—<filename class="extension">.Z</filename>
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| 202 | to <filename class="extension">.gz</filename></para>
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| 203 | <indexterm zone="ch-system-gzip znew"><primary sortas="b-znew">znew</primary></indexterm>
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| 204 | </listitem>
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| 205 | </varlistentry>
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| 206 | </variablelist>
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[673b0d8] | 207 |
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| 208 | </sect2>
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| 209 |
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| 210 | </sect1>
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[81fd230] | 211 |
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