cygwin 1.7.9, problem with cygwin1.dll, path_conv::check, has_acls()? (Windows 7)

John Ruckstuhl
Thu Sep 15 00:41:00 GMT 2011

Larry Hall wrote:
>On 9/14/2011 4:31 PM, John Ruckstuhl wrote:
>> Larry Hall wrote:
>>> On 9/14/2011 1:56 PM, Thorsten Kampe wrote:
>>>> The obvious way to troubleshoot this would be to use a network drive (Z:
>>>> for instance) instead of UNC or to mount the share and see if that
>>>> works. Naturally it would also make sense to test the latest Cygwin
>>>> snapshot and to see if you get the same result if you use //localhost/C
>>>> $.
>>> Right.  I was thinking this could fall into the category of a network
>>> share that needs to have the "noacl" mount option set.  So another
>>> option is to try mounting the UNC path to a Cygwin path (in /etc/fstab)
>>> and specify the "noacl" option.

>> It seems you are suspicious of the mount... that a defective mount WOULD
>> interfere when the target is expressed one way, and WOULDNOT interfere
>> when the target is expressed the other way.
> Not defective, no.  In my case, I'm suggesting that you turn off POSIX
> permissions.  These sometimes cause problems for network drives.  So
> do something like this:
>    mkdir /foo
>    mount -o noacl,binary,notexec //hyperdisk/Data/Engineering/ruck /foo
> Then try the same tests using /foo as the root path.

Okay, Larry's thinking is confirmed.
    $ mkdir /foo.noacl
    $ mount -o noacl,binary,notexec //hyperdisk/Data/Engineering/ruck /foo.noacl
    $ mkdir /foo.acl
    $ mount -o binary,notexec //hyperdisk/Data/Engineering/ruck /foo.acl
    $ cd /foo.noacl
    $ touch xoo.1
    $ cd /foo.acl
    $ touch xoo.2
    touch: cannot touch `xoo.2': Permission denied
That is, problem shows under /foo.acl (but not under /foo.noacl)

But for what it's worth, my problem does NOT appear when I'm on a 1.7.7
System hitting that same fileserver-directory.

The system WITHOUT the problem is 
    Windows XP SP3, and uname -a says:
    CYGWIN_NT-5.1 HZ4X1C1 1.7.7(0,230/5/3) 2010-08-31 09:58 i686 Cygwin
The system WITH the problem is 
    Windows 7 SP1, and uname -a says:
    CYGWIN_NT-6.1 CND0360JCB 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin

I don't know if the differing behavior is due to different Cygwin or due
to different OS.
Also, thanks for the link to using-utils.html#mount !


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