[Pkg-samba-maint] Bug#882482: samba: says "Failed to preset unit" and deb-systemd-helper error on installation

[Julian Gilbey]

Package: samba
Version: 2:4.7.1+dfsg-2
Severity: normal

On installation, the following errors occurred:

Setting up samba (2:4.7.1+dfsg-2) ...
Failed to preset unit: Unit file /etc/systemd/system/samba-ad-dc.service is masked.
/usr/bin/deb-systemd-helper: error: systemctl preset failed on samba-ad-dc.service: No such file or directory

Interestingly:

erdos:~ # ls -l /etc/systemd/system/samba-ad-dc.service /lib/systemd/system/samba-ad-dc.service 
lrwxrwxrwx 1 root root   9 Jul  4  2016 /etc/systemd/system/samba-ad-dc.service -> /dev/null
-rw-r--r-- 1 root root 352 Nov 12 09:02 /lib/systemd/system/samba-ad-dc.service

I have no idea why /etc/systemd/system/samba-ad-dc.service symlinks to
/dev/null; I have no recollection of doing this myself.

Best wishes,

   Julian

-- Package-specific info:
* /etc/samba/smb.conf present, but not attached
* /etc/samba/dhcp.conf not present

-- System Information:
Debian Release: buster/sid
  APT prefers stretch
  APT policy: (500, 'stretch'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.13.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8) (ignored: LC_ALL set to en_GB.UTF-8), LANGUAGE=en_GB.utf8 (charmap=UTF-8) (ignored: LC_ALL set to en_GB.UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages samba depends on:
ii  adduser           3.116
ii  dpkg              1.19.0.4
ii  libattr1          1:2.4.47-2+b2
ii  libbsd0           0.8.6-3
ii  libc6             2.24-17
ii  libldb1           2:1.2.2-2
ii  libpam-modules    1.1.8-3.6
ii  libpam-runtime    1.1.8-3.6
ii  libpopt0          1.16-10+b2
ii  libpython2.7      2.7.14-2
ii  libtalloc2        2.1.10-2
ii  libtdb1           1.3.15-2
ii  libtevent0        0.9.33-2
ii  lsb-base          9.20170808
ii  procps            2:3.3.12-3
ii  python            2.7.14-1
ii  python-dnspython  1.15.0-1
ii  python-samba      2:4.7.1+dfsg-2
ii  python2.7         2.7.14-2
ii  samba-common      2:4.7.1+dfsg-2
ii  samba-common-bin  2:4.7.1+dfsg-2
ii  samba-libs        2:4.7.1+dfsg-2
ii  tdb-tools         1.3.15-2

Versions of packages samba recommends:
ii  attr                1:2.4.47-2+b2
ii  logrotate           3.11.0-0.1
ii  samba-dsdb-modules  2:4.7.1+dfsg-2
ii  samba-vfs-modules   2:4.7.1+dfsg-2

Versions of packages samba suggests:
pn  bind9          <none>
pn  bind9utils     <none>
pn  ctdb           <none>
pn  ldb-tools      <none>
ii  ntp            1:4.2.8p10+dfsg-5
pn  smbldap-tools  <none>
pn  ufw            <none>
ii  winbind        2:4.7.1+dfsg-2

-- debconf information:
  samba-common/title:
* samba/generate_smbpasswd: true
* samba/run_mode: daemons