Bug#906662: backuppc: BackupPC_Link reports MakeFileLink -5 errors

[Dominique Brazziel <sixerjman@gmail.com>]

Package: backuppc
Version: 3.3.1-5
Severity: normal

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
        Run backup

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
        Backup Completes, but BackupPC_link fails on all files
   * What was the outcome of this action?
        BackupPC_link got error -5 when calling
MakeFileLink(/var/lib/backuppc/pc/hostname/.../filename
   * What outcome did you expect instead?
        BackupPC_link finishes cleanly and hard links created
*** End of the template - remove these template lines ***



-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.17.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages backuppc depends on:
ii  adduser                                    3.117
ii  apache2 [httpd]                            2.4.34-1
ii  apache2-utils                              2.4.34-1
ii  bzip2                                      1.0.6-8.1
ii  debconf [debconf-2.0]                      1.5.69
ii  dpkg                                       1.19.0.5+b1
ii  exim4-daemon-light [mail-transport-agent]  4.91-6
ii  iputils-ping                               3:20180629-2
ii  libarchive-zip-perl                        1.60-1
ii  libc6                                      2.27-5
ii  libcgi-pm-perl                             4.38-1
pn  libdigest-md5-perl                         <none>
ii  libtime-parsedate-perl                     2015.103-2
ii  libwww-perl                                6.35-2
ii  lsb-base                                   9.20170808
ii  perl [libio-compress-perl]                 5.26.2-7
ii  samba-common-bin                           2:4.8.2+dfsg-2
ii  smbclient                                  2:4.8.2+dfsg-2
ii  tar                                        1.30+dfsg-2
ii  ucf                                        3.0038

Versions of packages backuppc recommends:
ii  libfile-rsyncp-perl          0.74-2.1+b4
ii  libio-dirent-perl            0.05-1+b6
ii  openssh-client [ssh-client]  1:7.7p1-4
ii  rrdtool                      1.7.0-1+b2
ii  rsync                        3.1.2-2.2

Versions of packages backuppc suggests:
ii  chromium [www-browser]     68.0.3440.75-2
ii  firefox-esr [www-browser]  52.9.0esr-1
ii  hv3 [www-browser]          3.0~fossil20110109-6
pn  par2                       <none>
ii  w3m [www-browser]          0.5.3-36+b1

-- Configuration Files:
/etc/backuppc/apache.conf changed [not included]
/etc/backuppc/hosts [Errno 13] Permission denied: '/etc/backuppc/hosts'
/etc/backuppc/localhost.pl [Errno 13] Permission denied: '/etc/backuppc/localhost.pl'

-- debconf information:
  backuppc/restart-webserver: true
* backuppc/configuration-note:
* backuppc/reconfigure-webserver: apache2