[Dovecot] Unable to (un)subscribe mbox with AIX, NFS and netapp filer

[Frank Bonnet]

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Which Ontap version do you run on the filer ?



Axel Luttgens wrote:
> Le 6 juil. 09 à 09:47, Ralf Becker a écrit :
> 
>> [...]
>>
>> Jul  6 08:14:32 trevi mail:err|error dovecot: IMAP(beckerr):
>>  fchown(/u/f0/rzuser/beckerr/Mail/.subscriptions.lock, -1, -1)
>>  failed: Invalid argument
>>
>> [...]
>>
>> The error just appears on NFS mounted shared and I'm not sure if
>> AIX or netapp is the cause.
> 
> According to the posix specification, fchown may return EINVAL when the
> owner or group ID is not a value supported by the implementation, or
> when the fildes argument refers to a pipe or socket or an fattach()-ed
> STREAM and the implementation disallows execution of fchown() on a pipe.
> 
> Wouldn't it be worth to check what kind of entity gets created under
> your environment?
> I ask because I wouldn't exclude without further investigations the
> possibility of encountering other side effects wrt files throughout the
> code.
> 
> 
>> So to determine the real problem is
>> not easy, but to fix it is:
>>
>> While uid and gid are both -1 the call could be suppressed, because
>> nothing is really changed:
>>
>> --- ./lib/file-dotlock.c.org    2009-07-06 09:25:14.000000000 +0200
>> +++ ./lib/file-dotlock.c    2009-07-06 09:24:48.000000000 +0200
>> @@ -780,7 +780,7 @@
>>     fd = file_dotlock_open(set, path, flags, &dotlock);
>>     umask(old_mask);
>>
>> -    if (fd != -1) {
>> +    if (fd != -1 && (uid != -1 || gid != -1)) {
>>         if (fchown(fd, uid, gid) < 0) {
>>             if (errno == EPERM && uid == (uid_t)-1) {
>>                 i_error("%s", eperm_error_get_chgrp("fchown",
> 
> Alternatively, perhaps could you write a small c program so as to test a
> fchown(fd,-1,-1) operation on a "regular" file as see whether it fails
> or not.
> 
> HTH,
> Axel

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