Comment 57 for bug 1325142

I am reopening the Trusty task, as I've re-confirmed this bug in 14.04 chroot. apt upgrading will fail on libpam-systemd:

root@x250:/# apt dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
  libfreetype6 os-prober
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
E: Can not write log (Is /dev/pts mounted?) - openpty (2: No such file or directory)
Setting up libpam-systemd:amd64 (204-5ubuntu20.19) ...
initctl: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused
invoke-rc.d: unknown initscript, /etc/init.d/systemd-logind not found.
runlevel:/var/run/utmp: No such file or directory
dpkg: error processing package libpam-systemd:amd64 (--configure):
 subprocess installed post-installation script returned error exit status 100
Errors were encountered while processing:
 libpam-systemd:amd64
E: Sub-process /usr/bin/dpkg returned an error code (1)

Note that I can work around this by disabling policy-rc.d and initctl as such:

#!/bin/sh

# Ensure that apt upgrades work in Ubuntu on Windows
# environments, which do not use Ubuntu's /sbin/init
# Install a dummy, exit-non-zero policy-rc.d
cat >/usr/sbin/policy-rc.d <<EOF
#!/bin/sh
exit 101
EOF
chmod +x /usr/sbin/policy-rc.d
# Move initctl out of the way, install dummy initctl
dpkg-divert --local --rename --add /sbin/initctl
ln -sf /bin/true /sbin/initctl