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Groups > comp.arch.embedded > #18511

Re: Filesystem syntax constraints under Windows

From Stefan Reuther <stefan.news@arcor.de>
Newsgroups comp.arch.embedded
Subject Re: Filesystem syntax constraints under Windows
Date 2014-10-10 18:42 +0200
Message-ID <m199ak.ao.1@stefan.msgid.phost.de> (permalink)
References <m18295$e3o$1@speranza.aioe.org>

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Don Y wrote:
> Does anyone know which filesystem naming constraints are imposed
> in Windows itself vs. the file system layer?  Said another way,
> which constraints are *invariants* regardless of the filesystem?
> 
> E.g., can a non-native filesystem redefine '+' to replace "../"?
> Or, allow support for ':' in names?  Or, replace '\' with '/'?
> Or, ...

Here is what Microsoft has to say on the topic:
http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx

TL;DR, the reserved characters are
- "\", "/" for the path separator
- ":" for the drive letter separator, and to separate file names
  and alternate data streams
- "?" and "*" because they are used in wildcards
- ">", "<", "|", and """ because they are used in shell syntax

The 'CreateFile' function refuses to create files with these names. It
might be possible to use some lower-level interface to create such
files, but that wouldn't get you much as no other program would be able
to access them.

Thus, for the specific questions: a file system driver could interpret
"+" to mean the parent directory. It can also somehow support ":" within
file names (at least NTFS manages to do that somehow for alternate data
streams). Replacing "\" with "/" is automatic in some sense, because the
system already supports both as the directory separator.


  Stefan

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Thread

Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 00:31 -0700
  Re: Filesystem syntax constraints under Windows glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-10-10 09:06 +0000
    Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-10 13:32 +0200
      Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 07:23 -0700
        Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 07:26 -0700
          Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-10 19:17 +0300
            Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-10 19:12 +0200
              Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-10 20:34 +0300
              Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 11:32 -0700
            Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 10:53 -0700
              Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-10 21:24 +0300
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 13:36 -0700
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-11 00:18 +0300
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 15:28 -0700
                Re: Filesystem syntax constraints under Windows Tonton Th <tTh@nowhere.invalid> - 2014-10-12 20:07 +0000
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-12 19:52 -0700
              Re: Filesystem syntax constraints under Windows Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2014-10-10 21:15 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-10 23:04 +0300
            Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-11 11:28 +0200
              Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-11 17:13 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-11 17:26 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-11 18:51 +0300
                Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-12 12:04 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-12 15:59 +0300
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-12 08:04 -0700
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-12 18:47 +0300
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-12 09:01 -0700
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-12 09:05 -0700
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-12 19:17 +0300
                Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-13 19:26 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-13 22:00 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-14 10:25 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-14 13:28 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-14 14:37 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-14 16:00 +0300
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-14 06:19 -0700
                Re: Filesystem syntax constraints under Windows Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2014-10-15 19:57 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-16 00:06 +0300
                Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-16 18:16 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-16 20:49 +0300
                Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-14 18:59 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-14 21:39 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-14 23:29 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-15 00:46 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-15 01:38 +0200
        Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-10 17:31 +0200
          Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 10:34 -0700
    Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 06:59 -0700
  Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-10 18:42 +0200
    Re: Filesystem syntax constraints under Windows glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-10-10 19:00 +0000
    Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-10 13:43 -0700
      Re: Filesystem syntax constraints under Windows upsidedown@downunder.com - 2014-10-11 11:06 +0300
        Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-11 01:35 -0700
        Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-11 17:24 +0300
        Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-11 17:43 +0200
          Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-12 12:07 +0200
            Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-12 23:41 +0200
              Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-13 19:14 +0200
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-13 20:18 +0200
                Re: Filesystem syntax constraints under Windows Mel Wilson <mwilson@the-wire.com> - 2014-10-15 18:43 +0000
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-15 21:58 +0200
                Re: Filesystem syntax constraints under Windows George Neuner <gneuner2@comcast.net> - 2014-10-15 23:55 -0400
    Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-20 09:45 -0700
      Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-21 18:47 +0200
        Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-21 15:38 -0700
          Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-21 17:51 -0700
          Re: Filesystem syntax constraints under Windows George Neuner <gneuner2@comcast.net> - 2014-10-22 01:35 -0400
            Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-21 23:22 -0700
              Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-22 18:39 +0200
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-22 11:34 -0700
                Re: Filesystem syntax constraints under Windows upsidedown@downunder.com - 2014-10-22 22:11 +0300
            Re: Filesystem syntax constraints under Windows glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-10-23 00:20 +0000
              Re: Filesystem syntax constraints under Windows George Neuner <gneuner2@comcast.net> - 2014-10-23 01:36 -0400
                Re: Filesystem syntax constraints under Windows glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-10-23 09:08 +0000
                Re: Filesystem syntax constraints under Windows George Neuner <gneuner2@comcast.net> - 2014-10-23 14:50 -0400
                Re: Filesystem syntax constraints under Windows Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2014-10-23 21:42 +0200
      Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-22 01:21 +0300
        Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-21 15:51 -0700
          Re: Filesystem syntax constraints under Windows glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2014-10-21 23:27 +0000
            Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-21 16:50 -0700
            Re: Filesystem syntax constraints under Windows Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2014-10-22 21:00 +0200
              Re: Filesystem syntax constraints under Windows upsidedown@downunder.com - 2014-10-22 22:54 +0300
          Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-22 02:32 +0300
            Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-21 17:21 -0700
              Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-22 03:52 +0300
                Re: Filesystem syntax constraints under Windows Don Y <this@is.not.me.com> - 2014-10-21 21:13 -0700
            Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-22 08:10 +0200
              Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-22 12:00 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-22 13:11 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-22 15:19 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-22 15:21 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-22 17:26 +0300
                Re: Filesystem syntax constraints under Windows Stefan Reuther <stefan.news@arcor.de> - 2014-10-22 18:46 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-23 02:37 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-22 23:09 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-23 03:06 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-23 10:18 +0200
                Re: Filesystem syntax constraints under Windows Dimiter_Popoff <dp@tgi-sci.com> - 2014-10-23 13:56 +0300
                Re: Filesystem syntax constraints under Windows David Brown <david.brown@hesbynett.no> - 2014-10-23 15:59 +0200

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