1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN" "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
<!ENTITY % general-entities SYSTEM "../general.ent">
<!ENTITY % patches-entities SYSTEM "../patches.ent">
%general-entities;
%patches-entities;
]>
<sect1 id="ch-system-gzip" role="wrap">
<title>Gzip-&gzip-version;</title>
<?dbhtml filename="gzip.html"?>
<indexterm zone="ch-system-gzip"><primary sortas="a-Gzip">Gzip</primary></indexterm>
<sect2 role="package"><title/>
<para>The Gzip package contains programs for compressing and decompressing
files.</para>
<segmentedlist>
<segtitle>&buildtime;</segtitle>
<segtitle>&diskspace;</segtitle>
<seglistitem><seg>0.1 SBU</seg><seg>2.2 MB</seg></seglistitem>
</segmentedlist>
<segmentedlist>
<segtitle>&dependencies;</segtitle>
<seglistitem><seg>Bash, Binutils, Coreutils, Diffutils,
GCC, Glibc, Grep, Make, and Sed</seg></seglistitem>
</segmentedlist>
</sect2>
<sect2 role="installation">
<title>Installation of Gzip</title>
<para>Gzip has 2 known security vulnerabilities. The following patch
addresses both of them:</para>
<screen><userinput>patch -Np1 -i ../&gzip-security_fix-patch;</userinput></screen>
<para>Prepare Gzip for compilation:</para>
<screen><userinput>./configure --prefix=/usr</userinput></screen>
<para>The <command>gzexe</command> script has the location of the
<command>gzip</command> binary hard-wired into it. Because the
location of the binary is changed later, the following command ensures
that the new location gets placed into the script:</para>
<screen><userinput>sed -i 's@"BINDIR"@/bin@g' gzexe.in</userinput></screen>
<para>Compile the package:</para>
<screen><userinput>make</userinput></screen>
<para>Install the package:</para>
<screen><userinput>make install</userinput></screen>
<para>Move the <command>gzip</command> program to the <filename
class="directory">/bin</filename> directory and create some commonly used
symlinks to it:</para>
<screen><userinput>mv -v /usr/bin/gzip /bin
rm -v /usr/bin/{gunzip,zcat}
ln -sv gzip /bin/gunzip
ln -sv gzip /bin/zcat
ln -sv gzip /bin/compress
ln -sv gunzip /bin/uncompress</userinput></screen>
</sect2>
<sect2 id="contents-gzip" role="content"><title>Contents of Gzip</title>
<segmentedlist>
<segtitle>Installed programs</segtitle>
<seglistitem><seg>compress (link to gzip), gunzip (link to gzip), gzexe,
gzip, uncompress (link to gunzip), zcat (link to gzip), zcmp, zdiff,
zegrep, zfgrep, zforce, zgrep, zless, zmore, and znew</seg></seglistitem>
</segmentedlist>
<variablelist><bridgehead renderas="sect3">Short Descriptions</bridgehead>
<?dbfo list-presentation="list"?>
<?dbhtml list-presentation="table"?>
<varlistentry id="compress">
<term><command>compress</command></term>
<listitem>
<para>Compresses and decompresses files</para>
<indexterm zone="ch-system-gzip compress"><primary sortas="b-compress">compress</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="gunzip">
<term><command>gunzip</command></term>
<listitem>
<para>Decompresses gzipped files</para>
<indexterm zone="ch-system-gzip gunzip"><primary sortas="b-gunzip">gunzip</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="gzexe">
<term><command>gzexe</command></term>
<listitem>
<para>Creates self-decompressing executable files</para>
<indexterm zone="ch-system-gzip gzexe"><primary sortas="b-gzexe">gzexe</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="gzip">
<term><command>gzip</command></term>
<listitem>
<para>Compresses the given files using Lempel-Ziv (LZ77) coding</para>
<indexterm zone="ch-system-gzip gzip"><primary sortas="b-gzip">gzip</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="uncompress">
<term><command>uncompress</command></term>
<listitem>
<para>Decompresses compressed files</para>
<indexterm zone="ch-system-gzip uncompress"><primary sortas="b-uncompress">uncompress</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zcat">
<term><command>zcat</command></term>
<listitem>
<para>Decompresses the given gzipped files to standard output</para>
<indexterm zone="ch-system-gzip zcat"><primary sortas="b-zcat">zcat</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zcmp">
<term><command>zcmp</command></term>
<listitem>
<para>Runs <command>cmp</command> on gzipped files</para>
<indexterm zone="ch-system-gzip zcmp"><primary sortas="b-zcmp">zcmp</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zdiff">
<term><command>zdiff</command></term>
<listitem>
<para>Runs <command>diff</command> on gzipped files</para>
<indexterm zone="ch-system-gzip zdiff"><primary sortas="b-zdiff">zdiff</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zegrep">
<term><command>zegrep</command></term>
<listitem>
<para>Runs <command>egrep</command> on gzipped files</para>
<indexterm zone="ch-system-gzip zegrep"><primary sortas="b-zegrep">zegrep</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zfgrep">
<term><command>zfgrep</command></term>
<listitem>
<para>Runs <command>fgrep</command> on gzipped files</para>
<indexterm zone="ch-system-gzip zfgrep"><primary sortas="b-zfgrep">zfgrep</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zforce">
<term><command>zforce</command></term>
<listitem>
<para>Forces a <filename class="extension">.gz</filename> extension on all given files
that are gzipped files, so that <command>gzip</command> will not compress them again; this can be
useful when file names were truncated during a file transfer</para>
<indexterm zone="ch-system-gzip zforce"><primary sortas="b-zforce">zforce</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zgrep">
<term><command>zgrep</command></term>
<listitem>
<para>Runs <command>grep</command> on gzipped files</para>
<indexterm zone="ch-system-gzip zgrep"><primary sortas="b-zgrep">zgrep</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zless">
<term><command>zless</command></term>
<listitem>
<para>Runs <command>less</command> on gzipped files</para>
<indexterm zone="ch-system-gzip zless"><primary sortas="b-zless">zless</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="zmore">
<term><command>zmore</command></term>
<listitem>
<para>Runs <command>more</command> on gzipped files</para>
<indexterm zone="ch-system-gzip zmore"><primary sortas="b-zmore">zmore</primary></indexterm>
</listitem>
</varlistentry>
<varlistentry id="znew">
<term><command>znew</command></term>
<listitem>
<para>Re-compresses files from <command>compress</command> format to
<command>gzip</command> format—<filename class="extension">.Z</filename>
to <filename class="extension">.gz</filename></para>
<indexterm zone="ch-system-gzip znew"><primary sortas="b-znew">znew</primary></indexterm>
</listitem>
</varlistentry>
</variablelist>
</sect2>
</sect1>
|
