February 2003
Intermediate to advanced
560 pages
23h 11m
English
Content preview from Using Samba, Second Edition
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Name Mangling and Case
Back in the days of DOS and Windows 3.1, every filename was limited to eight uppercase characters, followed by a dot, and three more uppercase characters. This was known as the 8.3 format and was a huge nuisance. Windows 95/98/Me, Windows NT/2000/XP, and Unix have since relaxed this problem by allowing longer, sometimes case-sensitive, filenames. Table 8-4 shows the current naming state of several popular operating systems.
Table 8-4. Operating system filename limitations
|
Operating system |
File-naming rules |
|---|---|
|
DOS 6.22 or below |
Eight characters followed by a dot followed by a three-letter extension (8.3 format); case-insensitive |
|
Windows 3.1 for Workgroups |
Eight characters followed by a dot followed by a three-letter extension (8.3 format); case-insensitive |
|
Windows 95/98/Me |
255 characters; case-insensitive but case-preserving |
|
Windows NT/2000/XP |
255 characters; case-insensitive but case-preserving |
|
Unix |
255 characters; case-sensitive |
Samba still has to remain backward-compatible with network clients that store files in just the 8.3 format, such as Windows for Workgroups. If a user creates a file on a share called antidisestablishmentarianism.txt, a Windows for Workgroups client cannot tell it apart from another file in the same directory called antidisease.txt. Like Windows 95/98/Me and Windows NT/2000/XP, Samba has to employ a special method for translating a long filename to an 8.3 filename in such a way that similar filenames will not cause collisions. ...
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