Oddities with file deletion on CIFS drive

[Quanah Gibson-Mount]

--On Sunday, September 12, 2010 1:43 PM +0200 Corinna Vinschen wrote:

> On Sep 11 12:41, Corinna Vinschen wrote:
>> On Sep 10 10:48, Quanah Gibson-Mount wrote:
>> > --On Friday, September 10, 2010 7:09 PM +0200 Corinna Vinschen wrote:
>> >
>> > >> Let me know if there is anything else I can provide.
>> > >
>> > > I'm not sure.  I don't think so.  The problem is that the unlink(2)
>> > > function in Cygwin does not get any error code from any of the OS
>> > > functions it calls.  So, from the Cygwin POV everything worked fine.
>> > > How is it supposed to know that anything has gone wrong, if the
>> > > underlying OS doesn't tell?
>> >
>> > Heh, magic I guess.  If I mount the drive as a CIFS drive from a Linux
>> > box, I can delete the files just fine, so for now that gives me a
>> > workaround (I'll move my deletion process to a Linux box).
>>
>> This morning I had an idea.  While we were looking into the ACL, we
>> neglected the DOS attributes.  When you call `attrib' on one of the
>> files for which you didn't call chmod yet, is the R/O attribute set?
>>
>> If so, it *could* explain why Cygwin thought it has successfully deleted
>> the file, but it hasn't.  I also might have a workaround for this.
>
> I've checked in a change which probably fixed your issue.  The only
> exception are Cygwin symlinks of the old ".lnk" type, which has more
> than one link.  That should occur rather seldom.  Please test the
> next developer's snapshot from http://cygwin.com/snapshots/

Hi Corinna,

I will give the snapshot a test.  Here is the output of attrib:

build@zre-win-002 
/cygdrive/z/current/WINDOWS/ZDESKTOP-608/20100912050101_ZDESKTOP/ZimbraBuild/templates
$ attrib BUILD_ISYNC_template
A    R 
Z:\current\WINDOWS\ZDESKTOP-608\20100912050101_ZDESKTOP\ZimbraBuild\templates\BUILD_ISYNC_template


--Quanah


--

Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
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