[Samba] rpc_pipe_open_ncalrpc: connect(/run/samba/ncalrpc/EPMAPPER) failed: No such file or directory

[Ingo Asche]

Hi Michael,

just to second Rowland, this is my /run/samba/ncalrpc:

root at DC1:/run/samba/ncalrpc # ls -la
total 0
drwxr-xr-x 3 root root 100 Sep 28 11:34 .
drwxr-xr-x 6 root root 440 Sep 28 19:03 ..
srwxrwxrwx 1 root root   0 Sep 28 11:34 DEFAULT
srwxrwxrwx 1 root root   0 Sep 28 11:34 EPMAPPER
drwx------ 2 root root 460 Oct  1 08:25 np

Regards
Ingo
https://github.com/WAdama

Rowland Penny via samba schrieb am 02.10.2023 um 11:06:
> On Mon, 2 Oct 2023 11:37:00 +0300
> Michael Tokarev via samba <samba at lists.samba.org> wrote:
>
>> 01.10.2023 17:04, Rowland Penny via samba wrote:
>>> On Sun, 1 Oct 2023 08:41:01 +0300
>>> Michael Tokarev via samba <samba at lists.samba.org> wrote:
>>>
>>>> This question has already been asked in the past, but there was
>>>> no answer.
>>>>
>>>> The above message is logged quite often
>>>> in /var/log/samba/log.samba-dcerpcd. This is a stand-alone
>>>> anonymous read-only server.
>>>>
>>>> Is it something to worry about?  It smells like samba isn't working
>>>> properly.
>>> This could be something as simple as the directory being created as
>>> '/run/samba/ncalrpc/np/epmapper' and being searched for as
>>> '/run/samba/ncalrpc/np/EPMAPPER'. Which may or may not matter,
>>> depending on just what is supposed to end up in the
>>> 'emapper/EMAPPER' directory. Interestingly, I have
>>> '/run/samba/ncalcrpc/np/emapper' and '/run/samba/ncalrpc/EPMAPPER',
>>> I wonder if I should ?
>>>
>>> To me, this sounds like a bug, should the directory be created as
>>> '/run/samba/ncalrpc/np/EPMAPPER' or should it be searched for as
>>> '/run/samba/ncalrpc/np/epmapper' ?
>> I tried (sym)linking one to the other the first time it happened, - it
>> didn't work. I don't remember the error at that time though.  Think it
>> was with 4.16 still.  Lemme try it again..
> What I was trying to get at was the 'error' is that it seems to search
> in uppercase, but it is created in lowercase, one of those must be wrong.
> Which, I do not know, mainly because I also have 'EPMAPPER' in
> /run/samba/ncalrpc.
>
> I initially thought they were directories, but a bit more investigation
> turned up this from both:
>
> ls /run/samba/ncalrpc/EPMAPPER/
> ls: cannot access '/run/samba/ncalrpc/EPMAPPER/': Not a directory
> ls -lad /run/samba/ncalrpc/np/epmapper/
> ls: cannot access '/run/samba/ncalrpc/np/epmapper/': Not a directory
>
> So, they must, it appears, be files
>
>>>> If yes, how can I fix it?
>>> As a workaround, you could try setting 'log level = 0'.
>> Nope, definitely not, - as I wrote before, this message fills in the
>> logs and *other* important messages are hidden in the flood as the
>> result.  I want to know if something bad happens, not to hide errors,
>> - this is why I asked in the first place.  I can change debug level of
>> this very message to be something larger than current 0 and recompile,
>> *that* would be real workaround.
> I didn't think it would work, I just threw it it in as a thought and
> placeholder whilst the proper problem was fixed :-(
>
>> But I'd rather find the root cause and fix it instead.
> I 'think' the correct fix would be to find where 'epmapper' is being
> set to 'EPMAPPER' and fix that, but my 'C' isn't good enough to chase
> it down, never mind fix it.
>   
> Perhaps you should log a bug report ?
>
>> ...
>>> http://www.dcerpc.org/
>>>
>>> https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15
>>>
>>> https://wiki.samba.org/index.php/DCERPC
>> I've one name forever associated with samba & dcerpc in my mind -
>> Luke Kenneth Casson Leighton.  I think he was the one who created
>> dcerpc.org. And he was the strong advocate to rewrite most things
>> in samba (samba2 at the time, iirc) to use dcerpc in late 1990s..
>> with lots of emails on samba mailing lists, and with a lot of
>> resistance around that.  Dunno where he is now..
>>
> Wasn't that the guy who tried to fork Samba (Samba-NG ?) after falling
> out with the rest of the Samba devs ? Before my time.
>
> Rowland
>
>
>