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, and Sed</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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