Hardlink behavoir?

Hardlink behavoir?

[Eric D Crahen]

Hardlinks on NTFS work great when you are using them only from within the
cygwin environment. What happens when I modify one of the hardlinked files
from outside cygwin. For example, if I execute 'ln MyDocument.doc
MyLinkedDocument.doc' and then were to edit one of the files in Word or
some other non-cygwin app.

- Eric
http://www.cse.buffalo.edu/~crahen


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Re: Hardlink behavoir?

[Corinna Vinschen]

On Thu, Sep 12, 2002 at 07:33:54AM -0400, Eric D Crahen wrote:
> Hardlinks on NTFS work great when you are using them only from within the
> cygwin environment. What happens when I modify one of the hardlinked files
> from outside cygwin. For example, if I execute 'ln MyDocument.doc
> MyLinkedDocument.doc' and then were to edit one of the files in Word or
> some other non-cygwin app.

It depends.  If the editor opens the file and changes it, the hardlink
remains valid and both directory entries point to the same file.  If
the editor removes the file and creates it new, they are then two
different files.  But this is not different from any POSIX system.

Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.

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Re: Hardlink behavoir?

[Frank-Michael Moser]

There is a native command on WinXP (2000, NT?) to create hardlinks:

fsutil hardlink create /?
Syntax : fsutil hardlink create <neuer Dateinname> <vorhandener Dateiname>
   z.B. : fsutil hardlink create c:\foo.txt c:\bar.txt

After once a hardlink is created with Win's fsutil or with Cygwin's ln I 
found no means to decide which one originally did create it. So I guess 
that Cygwin-hardlinks should work fine for native Win-applications too.

Frank-Michael

Eric D Crahen wrote:
> Hardlinks on NTFS work great when you are using them only from within the
> cygwin environment. What happens when I modify one of the hardlinked files
> from outside cygwin. For example, if I execute 'ln MyDocument.doc
> MyLinkedDocument.doc' and then were to edit one of the files in Word or
> some other non-cygwin app.
> 
> - Eric
> http://www.cse.buffalo.edu/~crahen
> 
> 
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