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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><!-- http://linux-ntfs.sourceforge.net/ntfs/attributes/file_name.html --><html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <meta name="description" content="NTFS Documentation"> <link rel="stylesheet" type="text/css" href="../style/ntfsdoc.css"> <link rel="start" type="text/html" href="../index.html" title="NTFS Documentation"> <title>$FILE_NAME (0x30) - Attribute - NTFS Documentation</title> </head> <body> <table border="0" class="toolbar" summary="" cellspacing="0"> <tr> <td class="toolbar"><a accesskey="1" class="toolbar" href="../index.html">Home</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="2" class="toolbar" href="../files/index.html">Files</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="3" class="toolbar" href="../attributes/index.html">Attributes</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="4" class="toolbar" href="../concepts/index.html">Concepts</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="5" class="toolbar" href="../help/glossary.html">Glossary</a></td> <td class="toolbar"> </td> <td class="toolbar"><a accesskey="6" class="toolbar" href="../help/index.html">Help</a></td> </tr> </table> <h1>Attribute - $FILE_NAME (0x30)</h1> <a class="prevnext" accesskey="," href="attribute_list.html">Previous</a> <a class="prevnext" accesskey="." href="object_id.html">Next</a> <h2>Overview</h2> <p> This Attribute stores the name of the file attribute anl is always resident. </p> <p> As defined in <a href="../files/attrdef.html">$AttrDef</a>, this attribute has a minimum size of 68 bytes and a maximum of 578 bytes. This equates to a maximum filename length of 255 Unicode characters. </p> <h2>Layout of the Attribute (Resident)</h2> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Offset</th> <th class="numeric">Size</th> <th>Description</th> </tr> <tr> <td class="numeric">~</td> <td class="numeric">~</td> <td><a href="../concepts/attribute_header.html">Standard Attribute Header</a></td> </tr> <tr> <td class="numeric">0x00</td> <td class="numeric">8</td> <td><a href="#file_ref">File reference</a> to the parent directory.</td> </tr> <tr> <td class="numeric">0x08</td> <td class="numeric">8</td> <td>C Time - File Creation</td> </tr> <tr> <td class="numeric">0x10</td> <td class="numeric">8</td> <td>A Time - File Altered</td> </tr> <tr> <td class="numeric">0x18</td> <td class="numeric">8</td> <td>M Time - MFT Changed</td> </tr> <tr> <td class="numeric">0x20</td> <td class="numeric">8</td> <td>R Time - File Read</td> </tr> <tr> <td class="numeric">0x28</td> <td class="numeric">8</td> <td><a href="#file_size">Allocated size</a> of the file</td> </tr> <tr> <td class="numeric">0x30</td> <td class="numeric">8</td> <td><a href="#file_size">Real size</a> of the file</td> </tr> <tr> <td class="numeric">0x38</td> <td class="numeric">4</td> <td><a href="#file_flags">Flags</a>, e.g. Directory, compressed, hidden</td> </tr> <tr> <td class="numeric">0x3c</td> <td class="numeric">4</td> <td>Used by EAs and Reparse</td> </tr> <tr> <td class="numeric">0x40</td> <td class="numeric">1</td> <td>Filename length in characters (L)</td> </tr> <tr> <td class="numeric">0x41</td> <td class="numeric">1</td> <td><a href="../concepts/filename_namespace.html">Filename namespace</a></td> </tr> <tr> <td class="numeric">0x42</td> <td class="numeric">2L</td> <td>File name in Unicode (not null terminated)</td> </tr> </table> <h2>Notes</h2> <a name="file_ref"></a> <h3>File Reference</h3> <p>This is a File Reference to the base record of the parent directory.</p> <a name="file_size"></a> <h3>File Size</h3> <p> The allocated size of a file is the amount of disk space the file is taking up. It will be a multiple of the cluster size. The real size of the file is the size of the unnamed data attribute. This is the number that will appear in a directory listing. </p> <p> N.B. The Real Size is only present if the Starting VCN is zero. See the <a href="../concepts/attribute_header.html">Standard Attribute Header</a> for more information. </p> <a name="file_flags"></a> <h3>Flags</h3> <table border="1" summary="" cellspacing="0"> <tr> <th class="numeric">Flag</th> <th>Description</th> </tr> <tr> <td class="numeric">0x0001</td> <td>Read-Only</td> </tr> <tr> <td class="numeric">0x0002</td> <td>Hidden</td> </tr> <tr> <td class="numeric">0x0004</td> <td>System</td> </tr> <tr> <td class="numeric">0x0020</td> <td>Archive</td> </tr> <tr> <td class="numeric">0x0040</td> <td>Device</td> </tr> <tr> <td class="numeric">0x0080</td> <td>Normal</td> </tr> <tr> <td class="numeric">0x0100</td> <td>Temporary</td> </tr> <tr> <td class="numeric">0x0200</td> <td>Sparse File</td> </tr> <tr> <td class="numeric">0x0400</td> <td>Reparse Point</td> </tr> <tr> <td class="numeric">0x0800</td> <td>Compressed</td> </tr> <tr> <td class="numeric">0x1000</td> <td>Offline</td> </tr> <tr> <td class="numeric">0x2000</td> <td>Not Content Indexed</td> </tr> <tr> <td class="numeric">0x4000</td> <td>Encrypted</td> </tr> </table> <h3>Other Information</h3> <p> NTFS implements POSIX-style Hard Links by creating a file with several Filename Attributes. Each Filename Attribute has its own details and parent. When a Hard Linked file is deleted, its filename is removed from the MFT Record. When the last link is removed, then the file is really deleted. </p> <p> N.B. All fields, except the parent directory, are only updated when the filename is changed. Until then, they just become out of date. <a href="../attributes/standard_information.html">$STANDARD_INFORMATION Attribute</a>, however, will <b>always</b> be kept up-to-date. </p> <p> N.B. If the file has <a href="ea.html">EAs (Extended Attributes)</a>, then the EA Field will contain the size of buffer needed. </p> <p> N.B. If the file is a <a href="reparse_point.html">Reparse Point</a>, then the Reparse Field will give its type. </p> <br> <a class="contact" href="http://linux-ntfs.sourceforge.net/ntfs/attributes/file_name.html">Online</a> <!-- The two validators will only work if this page is visible on the web --> <a class="contact" href="http://validator.w3.org/check/referer">Validate HTML</a> <a class="contact" href="http://jigsaw.w3.org/css-validator/check/referer">Validate CSS</a> <a class="contact" href="mailto:webmaster@flatcap.org">$Id: file_name.html,v 1.11 2001/07/11 17:09:23 flatcap Exp $</a> </body></html>⌨️ 快捷键说明
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