GNU bug report logs - #12523
Solaris 10 "cp -p" returns unknown error on NFSv4 share,permissions preserve not work

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From: "Ryba, Lukas" <Lukas.Ryba <at> Commerzbank.com>
To: 'Jim Meyering' <jim <at> meyering.net>, Eric Blake <eblake <at> redhat.com>
Cc: 'Paul Eggert' <eggert <at> cs.ucla.edu>, "12523 <at> debbugs.gnu.org" <12523 <at> debbugs.gnu.org>
Subject: bug#12523: Solaris 10 "cp -p" returns unknown error on NFSv4 share, permissions preserve not work
Date: Fri, 12 Oct 2012 14:04:11 +0200

Oracle confirmed 'Bug 7161825 : acl() syscall can set errno to -1 rather than a valid error code'. It is fixed in Solaris 11(s11u1_17). Developers from Oracle are working on backporting fix to Solaris 10 right now.
From oficial description of bug correct errno code should be EFAULT.


-----Original Message-----
From: Jim Meyering [mailto:jim <at> meyering.net] 
Sent: Monday, October 08, 2012 7:45 PM
To: Eric Blake
Cc: Ryba, Lukas; 'Paul Eggert'; 12523 <at> debbugs.gnu.org
Subject: Re: bug#12523: Solaris 10 "cp -p" returns unknown error on NFSv4 share, permissions preserve not work

Eric Blake wrote:
> On 10/08/2012 05:45 AM, Ryba, Lukas wrote:
>> Vendor currently investigated that problem happens with the
>> combination of ZFS filesystem on NFSv3 only server and NFSv3 client.
>>
>> 1. facl with combination of ZFS filesystem(NFSv4 acls) exported by
>> NFSv4 server is ok
>> 2. facl with combination of UFS filesystem(POSIX acls) exported by
>> NFSv3 server is ok
>> 3. facl with combination of ZFS filesystem(NFSv4 acls) exported by
>> NFSv3 server fails on client with errno -1 which is our case
>> IMHO errno value in case 3 should be something useful. Like ENOTSUP.
>
> I wonder if gnulib should write rpl_facl() that checks for the case of
> facl() failing with errno set to -1 and explicitly reset errno to
> ENOTSUP in that case, to work around this vendor bug.

Sounds good to me, especially if the reporter confirms the fix.
The added overhead of a wrapper and test-upon-failure should be
acceptable for a function like facl.

>> -----Original Message-----
>> From: Paul Eggert [mailto:eggert <at> cs.ucla.edu]
>> Sent: Thursday, October 04, 2012 5:53 PM
>> To: Ryba, Lukas
>> Cc: 12523 <at> debbugs.gnu.org
>> Subject: Re: bug#12523: Solaris 10 "cp -p" returns unknown error on
>> NFSv4 share, permissions preserve not work
>>
>> On 10/04/2012 02:19 AM, Ryba, Lukas wrote:
>>> Workaround is simple. Just not use facl call right now. acl works ok.
>>
>> That might work around the problem on your Solaris implementation,
>> but it introduces other issues, on other platforms, so I'd like
>> to get at the bottom of why such a change is really needed.

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