source: BOOK/final-system/common/gzip.xml@ ce3fd14

clfs-1.2 clfs-2.1 clfs-3.0.0-systemd clfs-3.0.0-sysvinit systemd sysvinit
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1<?xml version="1.0" encoding="ISO-8859-1"?>
2<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
3 "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
4 <!ENTITY % general-entities SYSTEM "../../general.ent">
5 %general-entities;
6]>
7
8<sect1 id="ch-system-gzip" role="wrap">
9 <?dbhtml filename="gzip.html"?>
10
11 <title>Gzip-&gzip-version;</title>
12
13 <indexterm zone="ch-system-gzip">
14 <primary sortas="a-Gzip">Gzip</primary>
15 </indexterm>
16
17 <sect2 role="package">
18 <title/>
19
20 <para>The Gzip package contains programs for compressing and decompressing
21 files.</para>
22
23 </sect2>
24
25 <sect2 role="installation">
26 <title>Installation of Gzip</title>
27
28 <para os="p1">The following patch fixes two security vulnerabilities in Gzip:
29 a path traversal bug when using the <option>-N</option> option
30 (CAN-2005-1228), and a race condition in the file permission restore
31 code (CAN-2005-0998):</para>
32
33<screen os="p2"><userinput>patch -Np1 -i ../&gzip-security_fix-patch;</userinput></screen>
34
35 <para os="a">Prepare Gzip for compilation:</para>
36
37<screen os="b"><userinput>./configure --prefix=/usr</userinput></screen>
38
39 <para os="c">The <command>gzexe</command> script has the location of the
40 <command>gzip</command> binary hard-wired into it. Because the
41 location of the binary is changed later, the following command ensures
42 that the new location gets placed into the script:</para>
43
44<screen os="d"><userinput>sed -i 's@"BINDIR"@/bin@g' gzexe.in</userinput></screen>
45
46 <para os="e">Compile the package:</para>
47
48<screen os="f"><userinput>make</userinput></screen>
49
50 <para os="g">This package does not come with a test suite.</para>
51
52 <para os="h">Install the package:</para>
53
54<screen os="i"><userinput>make install</userinput></screen>
55
56 <para os="j">Move the <command>gzip</command> program to the <filename
57 class="directory">/bin</filename> directory and create some commonly
58 used symlinks to it:</para>
59
60<screen os="k"><userinput>mv -v /usr/bin/gzip /bin
61rm -v /usr/bin/{gunzip,zcat}
62ln -sv gzip /bin/gunzip
63ln -sv gzip /bin/zcat
64ln -sv gzip /bin/compress
65ln -sv gunzip /bin/uncompress</userinput></screen>
66
67 </sect2>
68
69 <sect2 id="contents-gzip" role="content">
70 <title>Contents of Gzip</title>
71
72 <segmentedlist>
73 <segtitle>Installed programs</segtitle>
74
75 <seglistitem>
76 <seg>compress (link to gzip), gunzip (link to gzip), gzexe, gzip,
77 uncompress (link to gunzip), zcat (link to gzip), zcmp, zdiff,
78 zegrep, zfgrep, zforce, zgrep, zless, zmore, and znew</seg>
79 </seglistitem>
80 </segmentedlist>
81
82 <variablelist>
83 <bridgehead renderas="sect3">Short Descriptions</bridgehead>
84 <?dbfo list-presentation="list"?>
85 <?dbhtml list-presentation="table"?>
86
87 <varlistentry id="compress">
88 <term><command>compress</command></term>
89 <listitem>
90 <para>Compresses and decompresses files</para>
91 <indexterm zone="ch-system-gzip compress">
92 <primary sortas="b-compress">compress</primary>
93 </indexterm>
94 </listitem>
95 </varlistentry>
96
97 <varlistentry id="gunzip">
98 <term><command>gunzip</command></term>
99 <listitem>
100 <para>Decompresses gzipped files</para>
101 <indexterm zone="ch-system-gzip gunzip">
102 <primary sortas="b-gunzip">gunzip</primary>
103 </indexterm>
104 </listitem>
105 </varlistentry>
106
107 <varlistentry id="gzexe">
108 <term><command>gzexe</command></term>
109 <listitem>
110 <para>Creates self-decompressing executable files</para>
111 <indexterm zone="ch-system-gzip gzexe">
112 <primary sortas="b-gzexe">gzexe</primary>
113 </indexterm>
114 </listitem>
115 </varlistentry>
116
117 <varlistentry id="gzip">
118 <term><command>gzip</command></term>
119 <listitem>
120 <para>Compresses the given files using Lempel-Ziv (LZ77) coding</para>
121 <indexterm zone="ch-system-gzip gzip">
122 <primary sortas="b-gzip">gzip</primary>
123 </indexterm>
124 </listitem>
125 </varlistentry>
126
127 <varlistentry id="uncompress">
128 <term><command>uncompress</command></term>
129 <listitem>
130 <para>Decompresses compressed files</para>
131 <indexterm zone="ch-system-gzip uncompress">
132 <primary sortas="b-uncompress">uncompress</primary>
133 </indexterm>
134 </listitem>
135 </varlistentry>
136
137 <varlistentry id="zcat">
138 <term><command>zcat</command></term>
139 <listitem>
140 <para>Decompresses the given gzipped files to standard output</para>
141 <indexterm zone="ch-system-gzip zcat">
142 <primary sortas="b-zcat">zcat</primary>
143 </indexterm>
144 </listitem>
145 </varlistentry>
146
147 <varlistentry id="zcmp">
148 <term><command>zcmp</command></term>
149 <listitem>
150 <para>Runs <command>cmp</command> on gzipped files</para>
151 <indexterm zone="ch-system-gzip zcmp">
152 <primary sortas="b-zcmp">zcmp</primary>
153 </indexterm>
154 </listitem>
155 </varlistentry>
156
157 <varlistentry id="zdiff">
158 <term><command>zdiff</command></term>
159 <listitem>
160 <para>Runs <command>diff</command> on gzipped files</para>
161 <indexterm zone="ch-system-gzip zdiff">
162 <primary sortas="b-zdiff">zdiff</primary>
163 </indexterm>
164 </listitem>
165 </varlistentry>
166
167 <varlistentry id="zegrep">
168 <term><command>zegrep</command></term>
169 <listitem>
170 <para>Runs <command>egrep</command> on gzipped files</para>
171 <indexterm zone="ch-system-gzip zegrep">
172 <primary sortas="b-zegrep">zegrep</primary>
173 </indexterm>
174 </listitem>
175 </varlistentry>
176
177 <varlistentry id="zfgrep">
178 <term><command>zfgrep</command></term>
179 <listitem>
180 <para>Runs <command>fgrep</command> on gzipped files</para>
181 <indexterm zone="ch-system-gzip zfgrep">
182 <primary sortas="b-zfgrep">zfgrep</primary>
183 </indexterm>
184 </listitem>
185 </varlistentry>
186
187 <varlistentry id="zforce">
188 <term><command>zforce</command></term>
189 <listitem>
190 <para>Forces a <filename class="extension">.gz</filename> extension on
191 all given files that are gzipped files, so that <command>gzip</command>
192 will not compress them again; this can be useful when file names were
193 truncated during a file transfer</para>
194 <indexterm zone="ch-system-gzip zforce">
195 <primary sortas="b-zforce">zforce</primary>
196 </indexterm>
197 </listitem>
198 </varlistentry>
199
200 <varlistentry id="zgrep">
201 <term><command>zgrep</command></term>
202 <listitem>
203 <para>Runs <command>grep</command> on gzipped files</para>
204 <indexterm zone="ch-system-gzip zgrep">
205 <primary sortas="b-zgrep">zgrep</primary>
206 </indexterm>
207 </listitem>
208 </varlistentry>
209
210 <varlistentry id="zless">
211 <term><command>zless</command></term>
212 <listitem>
213 <para>Runs <command>less</command> on gzipped files</para>
214 <indexterm zone="ch-system-gzip zless">
215 <primary sortas="b-zless">zless</primary>
216 </indexterm>
217 </listitem>
218 </varlistentry>
219
220 <varlistentry id="zmore">
221 <term><command>zmore</command></term>
222 <listitem>
223 <para>Runs <command>more</command> on gzipped files</para>
224 <indexterm zone="ch-system-gzip zmore">
225 <primary sortas="b-zmore">zmore</primary>
226 </indexterm>
227 </listitem>
228 </varlistentry>
229
230 <varlistentry id="znew">
231 <term><command>znew</command></term>
232 <listitem>
233 <para>Re-compresses files from <command>compress</command> format to
234 <command>gzip</command> format&mdash;<filename
235 class="extension">.Z</filename> to <filename
236 class="extension">.gz</filename></para>
237 <indexterm zone="ch-system-gzip znew">
238 <primary sortas="b-znew">znew</primary>
239 </indexterm>
240 </listitem>
241 </varlistentry>
242
243 </variablelist>
244
245 </sect2>
246
247</sect1>
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