#!/bin/bash
#
# rc		This file is responsible for starting/stopping
#		services when the runlevel changes.
#
#		Temporary feature:
#		If the action for a particular feature in the new run-level
#		is the same as the action in the previous run-level, this
#		script will neither start nor start that feature, since that
#		would have no effect except to thrash the system for no reason.
#		Once all scripts are converted to use start-stop-daemon
#		to _start_ their daemons (most of them only use it to kill
#		them), this feature can be removed.
#
# Author:	Miquel van Smoorenburg, <miquels@drinkel.ow.org>
#		Hacked to bits by Bruce Perens <Bruce@Pixar.com>
#		Modified for COL by Raymund Will <ray@lst.de>
#

# Un-comment the following for debugging.
# debug=echo
export RC_VERBOSE=true
unset RC_VERBOSE

  # Set onlcr to avoid staircase effect.
  stty onlcr 0>&1

  # Now find out what the current and what the previous runlevel are.

  runlevel=$RUNLEVEL
  # Get first argument. Set new runlevel to this argument.
  [ "$1" != "" ] && runlevel=$1

  previous=$PREVLEVEL

  export runlevel previous

  #RCD=/etc
  RCD=/etc/rc.d
  # Is there an rc directory for this new runlevel?
  if [ -d $RCD/rc$runlevel.d ]; then
	if [ "$runlevel" != 0 -a "$runlevel" != 1 -a "$runlevel" != 6 -a -x /bin/netconf ] ; then
		/bin/netconf --bootrc /etc/rc.d/rc$runlevel.d
		exit
	fi
    avoid=""	# A list of start scripts I don't have to run.

    # First, run the KILL scripts.
    if [ $previous != N ]; then
      for i in $RCD/rc$runlevel.d/K[0-9][0-9]*; do
        # Check if the script is there.
        [ ! -f $i ] && continue

        suffix=${i#$RCD/rc$runlevel.d/K[0-9][0-9]}

        # Generate the name of the start script corresponding
        # to this stop script, the start script in the previous
        # level, and the stop script in the previous level.
        # Check these files, and see if the previous level's
        # files are links to the ones for this level.
        # If they are, this level treats this feature the same
        # as the previous level, and I don't have to run these
        # files.
        identical=0
        start=$RCD/rc$runlevel.d/S[0-9][0-9]$suffix
        previous_start=$RCD/rc$previous.d/S[0-9][0-9]$suffix
        previous_stop=$RCD/rc$previous.d/K[0-9][0-9]$suffix

        if [ -f $previous_stop ] && [ $i -ef $previous_stop ]; then
          identical=1
          if [ -f $start ] || [ -f $previous_start ]; then
            if [ ! -f $start ] || \
               [ ! -f $previous_start ] || \
               [ ! $start -ef $previous_start ]; then
    	      identical=0
            else
              avoid=$avoid" "$start
            fi
          fi
        fi

        # Kill it.
        [ $identical = 0 ] && $debug $i stop
      done
    fi
    # Now run the START scripts for this runlevel.
    for i in $RCD/rc$runlevel.d/S*; do
      identical=0
      for j in $avoid; do
        if [ $i = $j ]; then
          identical=1
          break
        fi
      done
      if [ $identical = 0 ]; then
        suffix=${i#$RCD/rc$runlevel.d/S[0-9][0-9]}
        previous_start=$RCD/rc$previous.d/S[0-9][0-9]$suffix
        stop=$RCD/rc$runlevel.d/K[0-9][0-9]$suffix
        if [ -f $previous_start ] \
         && [ $i -ef $previous_start ] \
         && [ ! -f $stop ]; then
          identical=1
        fi

      fi

      [ $identical = 0 ] && [ -f $i ] && $debug $i start
    done
  fi
# eof /etc/rc.d/rc