[Bug 1583324] Re: Samba won't start when an include statement in smb.conf has a variable substitution

[Mike E.]

With the latest version (4.3.11+dfsg-0ubuntu0.16.04.13) I still get
failures when I try to startup samba with an include that contains %U.

I think the difference is that I'm using samba as an AD DC.  So the
service is started with systemctl (re)start samba-ad-dc instead of the
smbd and nmbd services.

The watered down smb.conf is:

[global]
    workgroup = WORKGROUP
    realm = AD.WORKGROUP.COM
    netbios name = SERVER1
    server role = active directory domain controller
    server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl, winbindd, ntp_signd, kcc, dnsupdate
    idmap_ldb:use rfc2307 = yes
    include = /etc/samba/smb.conf.%U

[netlogon]
    path = /var/lib/samba/sysvol/ad.workgroup.com/scripts
    read only = No

[sysvol]
    path = /var/lib/samba/sysvol
    read only = No

Samba will refuse to start with the above smb.conf unless the include
line is removed or changed to a static file.

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https://bugs.launchpad.net/bugs/1583324

Title:
  Samba won't start when an include statement in smb.conf has a variable
  substitution

Status in samba package in Ubuntu:
  Incomplete

Bug description:
  Samba refuses to start when the smb.conf file contains an include line
  with a variable substitution like "include = /etc/samba/smb.conf.%U"

  According to the man page for smb.conf, all but a few specific
  variable substitutions should work.

  include (G)

             This allows you to include one config file inside another.
  The file is included literally, as though typed in place.

             It takes the standard substitutions, except %u, %P and %S.

             The parameter include = registry has a special meaning: It does not include a file named registry from the current working directory, but
             instead reads the global configuration options from the registry. See the section on registry-based configuration for details. Note that
             this option automatically activates registry shares.

             Default: include =

             Example: include = /usr/local/samba/lib/admin_smb.conf

  
  It is probably related to this bug in samba:
  https://bugzilla.samba.org/show_bug.cgi?id=10722

  Description:    Ubuntu 16.04 LTS
  Release:        16.04

  samba:
    Installed: 2:4.3.9+dfsg-0ubuntu0.16.04.1
    Candidate: 2:4.3.9+dfsg-0ubuntu0.16.04.1
    Version table:
   *** 2:4.3.9+dfsg-0ubuntu0.16.04.1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
          100 /var/lib/dpkg/status
       2:4.3.8+dfsg-0ubuntu1 500
          500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages

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