| 词条 | Filename mangling |
| 释义 |
The process of filename mangling, in computing, involves a translation of the file name for compatibility at the operating system level. It occurs when a filename on a filesystem appears in a form incompatible with the operating system accessing it. Such mangling occurs, for example, on computer networks when a Windows machine attempts to access a file on a Unix server and that file has a filename which includes characters not valid in Windows. FAT Derivative Filesystem{{main|File Allocation Table|8.3}}Legacy support under VFATA common example of name mangling occurs on VFAT file systems on versions of Windows from Windows 95 onwards. The VFAT specification{{clarify|date=December 2016}} allows Long File Names (LFNs). For backwards-compatibility with MS-DOS and older Windows software, which recognizes filenames of a maximum of 11 characters in length with 8.3 format (i.e.: an eight-letter filename, a dot and a three-letter extension, such as Normally{{clarify|date=December 2016}}, when using compatible Windows programs which use standard Windows methods{{which|date=December 2016}} of reading the disk, the I/O subsystem returns the long filename to the program — however, if an old DOS application or an old Windows application tries to address the file, it will use the older, 8.3-only APIs, or work at a lower level and perform its own disk access, which results in the return of an 8.3 filename. In this case, the filenames become mangled by taking the first six non-space characters in the filename and adding a tilde (~) and then a number to ensure the uniqueness of the 8.3 filename on the disk. This mangling scheme can turn (for example) Unix Filesystems{{which|date=December 2016}}Unix file names can contain colons or backslashes, whereas Windows interprets such characters in other{{which|date=December 2016}} ways. Accordingly{{clarify|date=December 2016}}, software could mangle the Unix file "Notes: 11\\04\\03" as "Notes_ 11-04-03" to enable Windows software to remotely access the file. Other Unix-like systems, such as Samba on Unix, use different{{clarify|date=December 2016}} mangling systems to map long filenames to DOS-compatible filenames (although Samba administrators can configure this behavior in the config file).[1] Mac OSmacOS's Finder displays instances of ":" in file and directory names with a "/". This is because the classic Mac OS used the ":" character internally as a path separator. Listing these files or directories using a terminal emulator displays a ":" rather than the "/" character, though. References1. ^{{cite book|last= Eckstein|first= Robert|authorlink=|author2=David Collier-Brown |author3=Peter Kelly |firstn= |lastn=|authorn-link=|editor=|editorn=|editorn-last=|editorn-first=|editor-link=|editorn-link=|others=|title= Using Samba|trans-title=|url= http://oreilly.com/catalog/samba/chapter/book/ch05_04.html|accessdate= 2009-10-23|edition= 1st|series=|volume=|date= November 1999|origyear=|publisher= O'Reilly & Associates, Inc|location=|language=|isbn=|oclc=|doi=|bibcode=|id=|page=|pages=|nopp=|chapter= 5.4 Name Mangling and Case|trans-chapter=|chapterurl=|quote=|ref=|laysummary=|laydate=|separator=|postscript= |lastauthoramp=}} {{Computer files}} 2 : Computer file systems|Computer files |
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