[Bug 689820] Re: initscript emulation layer fails on start/stop/restart for jobs that don't spawn long lived processes

[Curtis Hovey]

** No longer affects: null

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https://bugs.launchpad.net/bugs/689820

Title:
  initscript emulation layer fails on start/stop/restart for jobs that
  don't spawn long lived processes

Status in “upstart” package in Ubuntu:
  New

Bug description:
  /lib/init/upstart-job doesn't perform the requested stop/start/restart
  action for Upstart jobs that don't spawn long-lived processes.

  For example, qemu-kvm's upstart job doesn't start any daemons, but
  rather its pre-start script sets some sysctls and loads kernel
  modules, and its post-stop script removes those modules. Its job
  scripts never get called when the init script emulation (/etc/init.d,
  invoke-rc.d(8)) is used, since no process is associated with the job.

  This seems to be the case even in the most recent upstart, in natty
  (0.6.6-3).

  start|stop|restart)
  [...]
      PID=$(status "$JOB" 2>/dev/null | awk '/[0-9]$/ { print $NF }')
      if [ -z "$PID" ] && [ "$COMMAND" = "stop" ]; then
          exit 0
      elif [ -n "$PID" ] && [ "$COMMAND" = "start" ]; then
          exit 0
      elif [ -z "$PID" ] && [ "$COMMAND" = "restart" ]; then
          start "$JOB"
          exit 0
      fi

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