85 lines
2.3 KiB
HTML
85 lines
2.3 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<html>
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<meta http-equiv="Content-Type" content=
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"text/html; charset=utf-8">
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<title>file - Determine file type</title>
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<LINK rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</HEAD>
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<body bgcolor="#FFFFFF">
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<!-- Java sync-link -->
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<SCRIPT LANGUAGE="Javascript" SRC="../rzahg/synch.js" TYPE="text/javascript"></SCRIPT>
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<h2>file - Determine file
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type</h2>
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<strong>Synopsis</strong>
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<p><strong>file [-m</strong> <em>MagicFile</em><strong>]
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[-f</strong> <em>ListFile</em><strong>]</strong> [ <em>file
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...</em> ]</p>
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<p><strong>file [-c] [-m</strong> <em>
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MagicFile</em><strong>]</strong></p>
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<p><strong>Description</strong></p>
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<p>In the first synopsis form, the <strong>file</strong> utility
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determines the type of object for the specified <em>file</em>. The
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<strong>file</strong> utility will make a best guess determination
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of the type. The file type is then written to standard output. If
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the pathname is determined to be a regular file, <strong>
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file</strong> examines the first 1024 bytes to determine the type.
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By default, the <strong>file</strong> utility uses the /etc/magic
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file to help identify files that have defined patterns at specified
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byte offsets within the object.</p>
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<p>In the second synopsis form, the <strong>file</strong> utility
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checks the specified <em>MagicFile</em> for format errors.</p>
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<p><strong>Options</strong></p>
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<dl>
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<dt><strong>-c</strong></dt>
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<dd>Checks a specified magic file for format errors.</dd>
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<dt><strong>-f</strong> <em>ListFile</em></dt>
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<dd>Specifies a file containing a list of file names to be tested.
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This <em>ListFile</em> must have only one file per line and not
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contain leading or trailing spaces.</dd>
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<dt><strong>-m</strong> <em>MagicFile</em></dt>
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<dd>Specifies the name of the magic file to use. The default magic
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file is /etc/magic.</dd>
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</dl>
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<p><strong>Operands</strong></p>
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<p>Each <em>file</em> is a pathname of a file to be tested.</p>
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<p><strong>Exit Status</strong></p>
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<ul>
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<li>0 when successful</li>
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<li>>0 when an error occurred</li>
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</ul>
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<p><strong>Related information</strong></p>
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<ul>
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<li><a href="find.htm">find - Find files</a></li>
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</ul>
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<!-- end ibmbody========================================================= -->
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</body>
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</html>
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