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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><link rel="STYLESHEET" type="text/css" href="wrs.css"><title> Local File Systems </title></head><body bgcolor="FFFFFF"><p class="navbar" align="right"><a href="index.html"><img border="0" alt="[Contents]" src="icons/contents.gif"></a><a href="GuideIX.html"><img border="0" alt="[Index]" src="icons/index.gif"></a><a href="c-filesys.html"><img border="0" alt="[Top]" src="icons/top.gif"></a><a href="c-filesys.html"><img border="0" alt="[Prev]" src="icons/prev.gif"></a><a href="c-filesys2.html"><img border="0" alt="[Next]" src="icons/next.gif"></a></p><font face="Helvetica, sans-serif" class="sans"><h3 class="H2"><i><a name="84373">4.1 Introduction</a></i></h3></font><dl class="margin"><dl class="margin"><dd><p class="Body"><a name="84375"> </a>This chapter discusses the organization, configuration, and use of VxWorks file systems. VxWorks provides two local file systems appropriate for real-time use with block devices (disks): one is compatible with MS-DOS file systems and the other with the RT-11 file system. The support libraries for these file systems are <b class="library">dosFsLib</b> and <b class="library">rt11FsLib</b>. VxWorks also provides a simple <i class="term">raw file system</i>, which treats an entire disk much like a single large file. The support library for this "file system" is <b class="library">rawFsLib</b>. </p><dd><p class="Body"><a name="84378"> </a>VxWorks also provides a file system for tape devices that do not use a standard file or directory structure on tape. The tape volume is treated much like a raw device where the entire volume is a large file. The support library for this file system is <b class="library">tapeFsLib</b>. In addition, VxWorks provides a file system library, <b class="library">cdromFsLib</b>, that allows applications to read data from CD-ROMs formatted according to the ISO 9660 standard file system.</p><dd><p class="Body"><a name="84381"> </a>In VxWorks, the file system is not tied to a specific type of block device or its driver. VxWorks block devices all use a standard interface so that file systems can be freely mixed with device drivers. Alternatively, you can write your own file systems that can be used by drivers in the same way, by following the same standard interfaces between the file system, the driver, and the I/O system. VxWorks I/O architecture makes it possible to have multiple file systems, even of different types, in a single VxWorks system. The block device interface is discussed in <a href="c-iosys9.html#85946"><i class="title">3.9.4 Block Devices</i></a>.</p></dl></dl><a name="foot"><hr></a><p class="navbar" align="right"><a href="index.html"><img border="0" alt="[Contents]" src="icons/contents.gif"></a><a href="GuideIX.html"><img border="0" alt="[Index]" src="icons/index.gif"></a><a href="c-filesys.html"><img border="0" alt="[Top]" src="icons/top.gif"></a><a href="c-filesys.html"><img border="0" alt="[Prev]" src="icons/prev.gif"></a><a href="c-filesys2.html"><img border="0" alt="[Next]" src="icons/next.gif"></a></p></body></html><!---by WRS Documentation (), Wind River Systems, Inc. conversion tool: Quadralay WebWorks Publisher 4.0.11 template: CSS Template, Jan 1998 - Jefro --->?? 快捷鍵說(shuō)明
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