[Bug 886333] [NEW] invoke-rc.d mishandles runlevels 0 and 6

[Phillip Susi]

Public bug reported:

invoke-rc.d checks the current runlevel to make sure not to start a
daemon that is not supposed to run in this runlevel.  If you set the
runlevel to 0 or 6 ( by setting the RUNLEVEL environment variable ), it
has a special clause that bypasses all checks and starts/stops the
daemon as told anyhow.  This clause should only apply to stopping the
daemon, not starting it.

To reproduce the error, run RUNLEVEL=0 invoke-rc.d somedaemon start

The relevant section in the script is:

## Handles shutdown sequences VERY safely
## i.e.: forget about policy, and do all we can to run the script.
## BTW, why the heck are we being run in a shutdown runlevel?!
if test x${RL} = x0 || test x${RL} = x6 ; then
    FORCE=yes
    RETRY=yes
    POLICYHELPER=
    BEQUIET=
    printerror "-----------------------------------------------------"
    printerror "WARNING: 'invoke-rc.d ${INITSCRIPTID} ${ACTION}' called"
    printerror "during shutdown sequence."
    printerror "enabling safe mode: initscript policy layer disabled"
    printerror "-----------------------------------------------------"
fi

** Affects: sysvinit (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/886333

Title:
  invoke-rc.d mishandles runlevels 0 and 6

Status in “sysvinit” package in Ubuntu:
  New

Bug description:
  invoke-rc.d checks the current runlevel to make sure not to start a
  daemon that is not supposed to run in this runlevel.  If you set the
  runlevel to 0 or 6 ( by setting the RUNLEVEL environment variable ),
  it has a special clause that bypasses all checks and starts/stops the
  daemon as told anyhow.  This clause should only apply to stopping the
  daemon, not starting it.

  To reproduce the error, run RUNLEVEL=0 invoke-rc.d somedaemon start

  The relevant section in the script is:

  ## Handles shutdown sequences VERY safely
  ## i.e.: forget about policy, and do all we can to run the script.
  ## BTW, why the heck are we being run in a shutdown runlevel?!
  if test x${RL} = x0 || test x${RL} = x6 ; then
      FORCE=yes
      RETRY=yes
      POLICYHELPER=
      BEQUIET=
      printerror "-----------------------------------------------------"
      printerror "WARNING: 'invoke-rc.d ${INITSCRIPTID} ${ACTION}' called"
      printerror "during shutdown sequence."
      printerror "enabling safe mode: initscript policy layer disabled"
      printerror "-----------------------------------------------------"
  fi

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