1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd" [
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4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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5 | %general-entities;
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6 | ]>
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7 |
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8 | <sect1 id="ch-system-gzip" role="wrap">
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9 | <?dbhtml filename="gzip.html"?>
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10 |
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11 | <title>Gzip-&gzip-version;</title>
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12 |
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13 | <indexterm zone="ch-system-gzip">
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14 | <primary sortas="a-Gzip">Gzip</primary>
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15 | </indexterm>
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16 |
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17 | <sect2 role="package">
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18 | <title/>
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19 |
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20 | <para>The Gzip package contains programs for compressing and decompressing
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21 | files.</para>
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22 |
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23 | <segmentedlist>
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24 | <segtitle>&dependencies;</segtitle>
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25 |
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26 | <seglistitem>
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27 | <seg>Bash, Binutils, Coreutils, Diffutils,
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28 | GCC, Glibc, Grep, Make, Patch, Sed, and Texinfo</seg>
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29 | </seglistitem>
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30 | </segmentedlist>
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31 |
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32 | </sect2>
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33 |
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34 | <sect2 role="installation">
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35 | <title>Installation of Gzip</title>
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36 |
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37 | <para os="p1">The following patch fixes two security vulnerabilities in Gzip.
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38 | First, a path traversal bug when using the <option>-N</option> option
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39 | (CAN-2005-1228) Second, a race condition in the file permission restore
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40 | code (CAN-2005-0998)</para>
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41 |
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42 | <screen os="p2"><userinput>patch -Np1 -i ../&gzip-security_fix-patch;</userinput></screen>
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43 |
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44 | <para os="a">Prepare Gzip for compilation:</para>
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45 |
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46 | <screen os="b"><userinput>./configure --prefix=/usr</userinput></screen>
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47 |
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48 | <para os="c">The <command>gzexe</command> script has the location of the
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49 | <command>gzip</command> binary hard-wired into it. Because the
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50 | location of the binary is changed later, the following command ensures
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51 | that the new location gets placed into the script:</para>
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52 |
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53 | <screen os="d"><userinput>sed -i 's@"BINDIR"@/bin@g' gzexe.in</userinput></screen>
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54 |
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55 | <para os="e">Compile the package:</para>
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56 |
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57 | <screen os="f"><userinput>make</userinput></screen>
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58 |
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59 | <para os="g">Install the package:</para>
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60 |
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61 | <screen os="h"><userinput>make install</userinput></screen>
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62 |
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63 | <para os="i">Move the <command>gzip</command> program to the <filename
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64 | class="directory">/bin</filename> directory and create some commonly
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65 | used symlinks to it:</para>
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66 |
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67 | <screen os="j"><userinput>mv /usr/bin/gzip /bin
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68 | rm /usr/bin/{gunzip,zcat}
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69 | ln -s gzip /bin/gunzip
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70 | ln -s gzip /bin/zcat
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71 | ln -s gzip /bin/compress
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72 | ln -s gunzip /bin/uncompress</userinput></screen>
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73 |
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74 | </sect2>
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75 |
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76 | <sect2 id="contents-gzip" role="content">
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77 | <title>Contents of Gzip</title>
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78 |
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79 | <segmentedlist>
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80 | <segtitle>Installed programs</segtitle>
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81 |
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82 | <seglistitem>
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83 | <seg>compress (link to gzip), gunzip (link to gzip), gzexe, gzip,
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84 | uncompress (link to gunzip), zcat (link to gzip), zcmp, zdiff,
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85 | zegrep, zfgrep, zforce, zgrep, zless, zmore, and znew</seg>
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86 | </seglistitem>
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87 | </segmentedlist>
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88 |
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89 | <variablelist>
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90 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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91 | <?dbfo list-presentation="list"?>
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92 | <?dbhtml list-presentation="table"?>
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93 |
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94 | <varlistentry id="compress">
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95 | <term><command>compress</command></term>
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96 | <listitem>
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97 | <para>Compresses and decompresses files</para>
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98 | <indexterm zone="ch-system-gzip compress">
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99 | <primary sortas="b-compress">compress</primary>
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100 | </indexterm>
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101 | </listitem>
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102 | </varlistentry>
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103 |
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104 | <varlistentry id="gunzip">
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105 | <term><command>gunzip</command></term>
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106 | <listitem>
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107 | <para>Decompresses gzipped files</para>
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108 | <indexterm zone="ch-system-gzip gunzip">
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109 | <primary sortas="b-gunzip">gunzip</primary>
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110 | </indexterm>
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111 | </listitem>
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112 | </varlistentry>
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113 |
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114 | <varlistentry id="gzexe">
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115 | <term><command>gzexe</command></term>
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116 | <listitem>
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117 | <para>Creates self-decompressing executable files</para>
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118 | <indexterm zone="ch-system-gzip gzexe">
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119 | <primary sortas="b-gzexe">gzexe</primary>
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120 | </indexterm>
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121 | </listitem>
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122 | </varlistentry>
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123 |
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124 | <varlistentry id="gzip">
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125 | <term><command>gzip</command></term>
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126 | <listitem>
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127 | <para>Compresses the given files using Lempel-Ziv (LZ77) coding</para>
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128 | <indexterm zone="ch-system-gzip gzip">
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129 | <primary sortas="b-gzip">gzip</primary>
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130 | </indexterm>
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131 | </listitem>
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132 | </varlistentry>
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133 |
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134 | <varlistentry id="uncompress">
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135 | <term><command>uncompress</command></term>
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136 | <listitem>
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137 | <para>Decompresses compressed files</para>
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138 | <indexterm zone="ch-system-gzip uncompress">
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139 | <primary sortas="b-uncompress">uncompress</primary>
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140 | </indexterm>
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141 | </listitem>
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142 | </varlistentry>
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143 |
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144 | <varlistentry id="zcat">
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145 | <term><command>zcat</command></term>
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146 | <listitem>
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147 | <para>Decompresses the given gzipped files to standard output</para>
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148 | <indexterm zone="ch-system-gzip zcat">
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149 | <primary sortas="b-zcat">zcat</primary>
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150 | </indexterm>
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151 | </listitem>
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152 | </varlistentry>
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153 |
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154 | <varlistentry id="zcmp">
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155 | <term><command>zcmp</command></term>
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156 | <listitem>
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157 | <para>Runs <command>cmp</command> on gzipped files</para>
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158 | <indexterm zone="ch-system-gzip zcmp">
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159 | <primary sortas="b-zcmp">zcmp</primary>
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160 | </indexterm>
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161 | </listitem>
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162 | </varlistentry>
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163 |
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164 | <varlistentry id="zdiff">
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165 | <term><command>zdiff</command></term>
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166 | <listitem>
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167 | <para>Runs <command>diff</command> on gzipped files</para>
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168 | <indexterm zone="ch-system-gzip zdiff">
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169 | <primary sortas="b-zdiff">zdiff</primary>
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170 | </indexterm>
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171 | </listitem>
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172 | </varlistentry>
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173 |
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174 | <varlistentry id="zegrep">
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175 | <term><command>zegrep</command></term>
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176 | <listitem>
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177 | <para>Runs <command>egrep</command> on gzipped files</para>
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178 | <indexterm zone="ch-system-gzip zegrep">
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179 | <primary sortas="b-zegrep">zegrep</primary>
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180 | </indexterm>
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181 | </listitem>
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182 | </varlistentry>
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183 |
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184 | <varlistentry id="zfgrep">
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185 | <term><command>zfgrep</command></term>
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186 | <listitem>
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187 | <para>Runs <command>fgrep</command> on gzipped files</para>
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188 | <indexterm zone="ch-system-gzip zfgrep">
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189 | <primary sortas="b-zfgrep">zfgrep</primary>
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190 | </indexterm>
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191 | </listitem>
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192 | </varlistentry>
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193 |
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194 | <varlistentry id="zforce">
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195 | <term><command>zforce</command></term>
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196 | <listitem>
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197 | <para>Forces a <filename class="extension">.gz</filename> extension on
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198 | all given files that are gzipped files, so that <command>gzip</command>
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199 | will not compress them again; this can be useful when file names were
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200 | truncated during a file transfer</para>
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201 | <indexterm zone="ch-system-gzip zforce">
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202 | <primary sortas="b-zforce">zforce</primary>
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203 | </indexterm>
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204 | </listitem>
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205 | </varlistentry>
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206 |
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207 | <varlistentry id="zgrep">
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208 | <term><command>zgrep</command></term>
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209 | <listitem>
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210 | <para>Runs <command>grep</command> on gzipped files</para>
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211 | <indexterm zone="ch-system-gzip zgrep">
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212 | <primary sortas="b-zgrep">zgrep</primary>
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213 | </indexterm>
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214 | </listitem>
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215 | </varlistentry>
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216 |
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217 | <varlistentry id="zless">
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218 | <term><command>zless</command></term>
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219 | <listitem>
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220 | <para>Runs <command>less</command> on gzipped files</para>
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221 | <indexterm zone="ch-system-gzip zless">
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222 | <primary sortas="b-zless">zless</primary>
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223 | </indexterm>
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224 | </listitem>
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225 | </varlistentry>
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226 |
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227 | <varlistentry id="zmore">
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228 | <term><command>zmore</command></term>
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229 | <listitem>
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230 | <para>Runs <command>more</command> on gzipped files</para>
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231 | <indexterm zone="ch-system-gzip zmore">
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232 | <primary sortas="b-zmore">zmore</primary>
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233 | </indexterm>
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234 | </listitem>
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235 | </varlistentry>
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236 |
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237 | <varlistentry id="znew">
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238 | <term><command>znew</command></term>
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239 | <listitem>
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240 | <para>Re-compresses files from <command>compress</command> format to
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241 | <command>gzip</command> format—<filename
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242 | class="extension">.Z</filename> to <filename
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243 | class="extension">.gz</filename></para>
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244 | <indexterm zone="ch-system-gzip znew">
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245 | <primary sortas="b-znew">znew</primary>
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246 | </indexterm>
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247 | </listitem>
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248 | </varlistentry>
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249 |
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250 | </variablelist>
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251 |
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252 | </sect2>
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253 |
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254 | </sect1>
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