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6.38. File-4.13
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Linux From Scratch - Version 6.1
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Chapter 6. 安装系统基础软件
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6.38. File-4.13
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<p>File 是用来判断文件类型的工具。</p>
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<strong><span class="segtitle">预计编译时间：</span></strong> <span class="seg">0.1 SBU</span>
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<strong><span class="segtitle">所需磁盘空间：</span></strong> <span class="seg">6.2 MB</span>
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<strong><span class="segtitle">安装依赖于：</span></strong> <span class="seg">Bash, Binutils, Coreutils, Diffutils, GCC, Glibc, Grep, Make, Sed, Zlib</span>
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6.38.1. 安装 File
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<p>为编译 File 做准备：</p>
<pre class="userinput"><kbd class="command">./configure --prefix=/usr</kbd></pre>
<p>编译软件包：</p>
<pre class="userinput"><kbd class="command">make</kbd></pre>
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安装软件包：
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<pre class="userinput"><kbd class="command">make install</kbd></pre>
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6.38.2. File 的内容 </h2>
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<strong><span class="segtitle">安装的程序：</span></strong> <span class="seg">file</span>
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<strong><span class="segtitle">安装的库文件：</span></strong> <span class="seg">libmagic.[a,so]</span>
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<a id="id3328817" name="id3328817"></a>简要描述</h3>
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<a id="file" name="file"></a><span class="term"><span><strong class="command">file</strong></span></span>
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<p>测试每一个指定的文件并且试图对它们进行分类。有三个测试集，按照下面的顺序执行：文件系统测试、幻数(magic number)测试、语言测试。第一个测试成功后会打印文件文件类型。</p>
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<a id="libmagic" name="libmagic"></a><span class="term"><tt class="filename">libmagic</tt></span>
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包含产生幻数(magic number)的函数，供 <span><strong class="command">file</strong></span>
程序使用。</p>
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