source: projects/initscripts/tags/initscripts-8.91.0/rc.d/rc @ 1108

#!/bin/bash
#
# rc            This file is responsible for starting/stopping
#               services when the runlevel changes. It is also
#               responsible for the very first setup of basic
#               things, such as setting the hostname.
#
# Original Author:       
#               Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
#

set -m

# check a file to be a correct runlevel script
check_runlevel ()
{
        # Check if the file exists at all.
        [ -x "$1" ] || return 1
        is_ignored_file "$1" && return 1
        return 0
}

# Now find out what the current and what the previous runlevel are.
argv1="$1"
set `/sbin/runlevel`
runlevel=$2
previous=$1
RUNLEVEL=$2
PREVLEVEL=$1
newrunlevel=$2
progress=0
export runlevel previous RUNLEVEL PREVLEVEL newrunlevel progress

# Source function library.
. /etc/init.d/functions

# check if we use upstart
UPSTART=
[ -x /sbin/initctl ] && UPSTART=yes

# initialize plymouth bootsplash
initsplash
[[ "$newrunlevel" = "0" || "$newrunlevel" = "6" ]] && \
  [ "$splash_mode" = "plymouth" ] && \
  rc_splash start $newrunlevel

# See if we want to be in user confirmation mode
if [ "$previous" = "N" ]; then
    if grep -i confirm /proc/cmdline >/dev/null || [ -f /var/run/confirm ] ; then
      rm -f /var/run/confirm
      CONFIRM=yes
      echo $"Entering interactive startup"
    else
      CONFIRM=
      echo $"Entering non-interactive startup"
    fi
fi

export CONFIRM

# Get first argument. Set new runlevel to this argument.
[ -n "$argv1" ] && runlevel="$argv1"

# Is there an rc directory for this new runlevel?
[ -d /etc/rc$runlevel.d ] || exit 0

# First, run the KILL scripts.
for i in /etc/rc$runlevel.d/K*; do
        # Check if the subsystem is already up.
        subsys=${i#/etc/rc$runlevel.d/K??}
        [ -f /var/lock/subsys/$subsys -o -f /var/lock/subsys/${subsys}.init ] || continue
        check_runlevel "$i" || continue

        update_boot_stage "$subsys"
        # Bring the subsystem down.
        [ -n "$UPSTART" ] && initctl emit --quiet stopping JOB=$subsys
        if egrep -q "(killproc |action )" $i ; then
                $i stop
        else
                action $"Stopping $subsys: " $i stop
        fi
        [ -n "$UPSTART" ] && initctl emit --quiet stopped JOB=$subsys
done

# Now run the START scripts.
for i in /etc/rc$runlevel.d/S*; do
        # Check if the subsystem is already up.
        subsys=${i#/etc/rc$runlevel.d/S??}
        [ -f /var/lock/subsys/$subsys ] && continue
        [ -f /var/lock/subsys/${subsys}.init ] && continue
        check_runlevel "$i" || continue

        # If we're in confirmation mode, get user confirmation
        if [ -n "$CONFIRM" ]; then
            confirm $subsys
            rc=$?
            if [ "$rc" = "1" ]; then
                continue
            elif [ "$rc" = "2" ]; then
                CONFIRM=
            fi
        fi

        update_boot_stage "$subsys"
        # Bring the subsystem up.
        [ -n "$UPSTART" ] && initctl emit --quiet starting JOB=$subsys
        if egrep -q "(daemon |action )" $i ; then
                if [ "$subsys" = "halt" -o "$subsys" = "reboot" ]; then
                        export LC_ALL=C
                        exec $i start
                else
                    $i start
                fi
        else
                if [ "$subsys" = "halt" -o "$subsys" = "reboot" -o "$subsys" = "single" -o "$subsys" = "local" ]; then
                    if [ "$subsys" = "halt" -o "$subsys" = "reboot" ]; then
                        export LC_ALL=C
                        exec $i start
                    fi
                    $i start
                else
                    action $"Starting $subsys: " $i start
                fi
        fi
        [ -n "$UPSTART" ] && initctl emit --quiet started JOB=$subsys
done

exit 0