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[Martin Pitt <martin.pitt@xxxxxxxxxx>]

Stracing "telinit u" shows some interesting actions:

lstat("/run/systemd/system/", 0x7fff0ff73700) = -1 ENOENT (No such file
or directory)

→ OK, that's the check whether systemd is running, it's expected to fail
under upstart

execve("/lib/sysvinit/telinit", ["telinit", "u"], ... ) = 0

→ Hm, that's from upstart-bin, also looks ok

connect(3, {sa_family=AF_LOCAL, sun_path=@"/com/ubuntu/upstart"}, 22) = 0
[...]
sendmsg(3, {msg_name(0)=NULL, msg_iov(2)=[{"l\1\3\1\0\0\0\0\1\0\0\0P\0\0\0\1\1o\0\23\0\0\0/com/ubuntu/Upstart\0\0\0\0\0\2\1s\0\25\0\0\0com.ubuntu.Upstart0_6\0\0\0\3\1s\0\7\0\0\0Restart\0", 96}, {"", 0}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 96
exit_group(0)                           = ?
+++ exited with 0 +++

Hm, nothing unusual here.

** Tags added: systemd-boot

** Attachment added: "strace"
   https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1430479/+attachment/4340826/+files/strace

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https://bugs.launchpad.net/bugs/1430479

Title:
  "telinit u" under upstart with systemd-sysv installed runs systemd

Status in systemd package in Ubuntu:
  In Progress

Bug description:
  I've today had two machines kill my X session during dist-upgrade, and
  it happened during libc6 postinst. Dmesg shows that systemd got
  somehow started during the earlier phase of the upgrade. X logs show a
  failure with "(EE) Cannot establish any listening sockets" etc..

  Adam can fill in the more detailed analysis of what's happening
  there.. but I think it should be fairly easy to reproduce by
  installing vivid from an earlier image and dist-upgrading to current,
  if needed.

  Reproducer:
   - Start with a standard utopic VM (e. g. adt-buildvm-ubuntu-cloud -r utopic)
   - Switch apt sources to vivid
   - sudo apt install systemd-sysv
   - sudo telinit u

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