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Re: V1.7 and endless loops triggerd by junction points
On May 6 10:41, Corinna Vinschen wrote:
> On May 5 21:15, Matthias Meyer wrote:
> > Corinna Vinschen wrote:
> > > Otherwise, the only difference as far as I can see is the fact that the
> > > user token attrib inherited from the Cygwin shell has more user rights
> > > enabled. Namely the backup and restore rights, which allows to access
> > > files and directories which are not available by default. However, this
> > > only works in an elevated shell, too.
> > >
> > > However, it's not Cygwin's fault that attrib is not up to speed with
> > > circular symlinks on an OS which allows them.
> > >
> > It seems to be the backup and restore rights. I can run a cmd as
> > administrator and attrib don't run into the endless loop.
> > Also I can run sh from a normal user and attrib will work right.
> > Only if I run attrib within a process with the backup and restore rights
> > attrib will run into this endless loop :-(
>
> There's a workaround for you, the cygdrop tool, part of the cygutils
> package.
>
> Here's an example:
>
> elevated bash$ cd /cygdrive/c/Users/All\ Users
>
> elevated bash$ attrib Desktop
> HR C:\ProgramData\Desktop
>
> elevated bash$ attrib Desktop\\Cygwin.lnk
> A C:\ProgramData\Desktop\Cygwin.lnk
>
> elevated bash$ cygdrop -p SeBackupPrivilege /cygdrive/c/Windows/System32/attrib -p Desktop\\Cygwin.lnk
> File not found - Desktop\Cygwin.lnk
>
> Unfortunately you have to use the full path to attrib to make it work
> since cygdrop doesn't perform a path search.
Sorry about that. It appears I just stumbled over a Cygwin bug in terms
of casesensitivity when using the execp family of functions. Just
calling `cygdrop -p SeBackupPrivilege attrib' without full path should
be fine, but it only works on systems which are not configured for
casesensitivity. I'll fix that in CVS.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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