samba - Jan 2023 - [4.13.13-Debian] " reopen_one_log: Unable to open new log file '/var/log/samba/': Is a directory"?

On 11/01/2023 09:55, Michael Tokarev via samba wrote:
> 11.01.2023 12:48, Gilles via samba wrote:
> 
>> [2023/01/11 10:04:49.943723,? 0] 
>> ../../lib/util/debug.c:1104(reopen_one_log)
>> reopen_one_log: Unable to open new log file '/var/log/samba/':
Is a
>> directory
> 
>> smb.conf: log file = /var/log/samba/%m
> 
> some daemons work without client information, ie, they're not 
> client-specific.
> These will try to open log files too. Without client info, "%m"
expands to
> nothing, to an empty string. So you'll have the error message like
that.
> 
> Fix your log file setting. Check what's the default for this.
> 
> /mjt
> 
> 
> 
There isn't a default and '%m' is supposed to work.

I think we need to see how the OP is running Samba, to do this, we need 
the output of 'testparm -s' or 'samba-tool testparm' if it is a
DC
(which it shouldn't be, because it looks like nmbd is running).

Rowland

11.01.2023 13:15, Rowland Penny via samba wrote:
>>> smb.conf: log file = /var/log/samba/%m
>>
>> some daemons work without client information, ie, they're not
client-specific.
>> These will try to open log files too. Without client info,
"%m" expands to
>> nothing, to an empty string. So you'll have the error message like
that.
>>
>> Fix your log file setting. Check what's the default for this.
> 
> There isn't a default and '%m' is supposed to work.
> 
> I think we need to see how the OP is running Samba, to do this, we need the
output of 'testparm -s' or 'samba-tool testparm' if it is a DC
(which it
> shouldn't be, because it looks like nmbd is running).
Sigh.  Rowland, sometimes you're not helpful at all. Like in this case.

Yes there's no default for "log file" parameter, - that's my
bad, I remember
seeing "/var/log/samba/log.%m" somewhere - it is not the default, it
is the
"example value" in man 5 smb.conf.

As you wrote multiple times yourself, netbios is dead. %m is a netbios
name of the client. And at the description of %m in man 5 smb.conf we
can see:

            This parameter is not available when Samba listens on port 445, as
            clients no longer send this information. If you use this macro in
            an include statement on a domain that has a Samba domain controller
            be sure to set in the [global] section smb ports = 139. This will
            cause Samba to not listen on port 445 and will permit include
            functionality to function as it did with Samba 2.x.

/var/log/samba/%m is *not* supposed to work, exactly the way it doesn't
work in the OP case.  The only thing needed for him is to fix the
log file parameter as I suggested to fix the issue.

Please stay a bit more focused.

Thanks,

/mjt

On 11/01/2023 11:15, Rowland Penny via samba wrote:
> Fix your log file setting. Check what's the default for this.
>
> There isn't a default and '%m' is supposed to work.
>
> I think we need to see how the OP is running Samba, to do this, we 
> need the output of 'testparm -s' or 'samba-tool testparm'
if it is a
> DC (which it shouldn't be, because it looks like nmbd is running).
It's a stand-alone server.

Here's the output from testparm -s:
============Load smb config files from /etc/samba/smb.conf
Loaded services file OK.
Weak crypto is allowed
Server role: ROLE_STANDALONE

# Global parameters
[global]
 ??????? bind interfaces only = Yes
 ??????? disable netbios = Yes
 ??????? disable spoolss = Yes
 ??????? guest account = www-data
 ??????? interfaces = lo enp0s20
 ??????? load printers = No
 ??????? log file = /var/log/samba/%m
 ??????? map to guest = Bad User
 ??????? netbios name = SAMBA
 ??????? printcap name = /dev/null
 ??????? server role = standalone server
 ??????? server string = Some great server
 ??????? show add printer wizard = No
 ??????? idmap config * : backend = tdb
 ??????? hosts allow = 127.0.0.1 192.168.0.0/24
 ??????? hosts deny = 0.0.0.0/0
 ??????? printing = bsd


[guest]
 ??????? comment = Some great directory
 ??????? force create mode = 0660
 ??????? force directory mode = 0770
 ??????? guest ok = Yes
 ??????? guest only = Yes
 ??????? path = /var/www/html/
 ??????? read only = No
=============