/init.d/rc
http://github.com/brinkman83/bashrc · Shell · 346 lines · 212 code · 38 blank · 96 comment · 51 complexity · ce241775a4509ea32df47354be8ec0be MD5 · raw file
- #! /bin/sh
- #
- # rc
- #
- # Starts/stops services on runlevel changes.
- #
- # Optimization: A start script is not run when the service was already
- # configured to run in the previous runlevel. A stop script is not run
- # when the the service was already configured not to run in the previous
- # runlevel.
- #
- # Authors:
- # Miquel van Smoorenburg <miquels@cistron.nl>
- # Bruce Perens <Bruce@Pixar.com>
- PATH=/sbin:/usr/sbin:/bin:/usr/bin
- export PATH
- # Un-comment the following for interactive debugging. Do not un-comment
- # this for debugging a real boot process as no scripts will be executed.
- # debug=echo
- # Specify method used to enable concurrent init.d scripts.
- # Valid options are 'none', 'startpar' and 'makefile'. To enable
- # the concurrent boot option, the init.d script order must allow for
- # concurrency. This is not the case with the default boot sequence in
- # Debian as of 2008-01-20. Before enabling concurrency, one need to
- # check the sequence values of all boot scripts, and make sure only
- # scripts that can be started in parallel have the same sequence
- # number, and that a scripts dependencies have a earlier sequence
- # number. See the insserv package for a away to reorder the boot
- # automatically to allow this.
- CONCURRENCY=none
- # Make sure the name survive changing the argument list
- scriptname="$0"
- umask 022
- on_exit() {
- echo "error: '$scriptname' exited outside the expected code flow."
- }
- trap on_exit EXIT # Enable emergency handler
- # Ignore CTRL-C only in this shell, so we can interrupt subprocesses.
- trap ":" INT QUIT TSTP
- # Set onlcr to avoid staircase effect.
- stty onlcr 0>&1
- # Functions for splash progress bars
- if [ -e /lib/init/splash-functions-base ] ; then
- . /lib/init/splash-functions-base
- else
- # Quiet down script if old initscripts version without /lib/init/splash-functions-base is used.
- splash_progress() { return 1; }
- splash_stop() { return 1; }
- fi
- # 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=$1
- if [ "$runlevel" = "" ]
- then
- echo "Usage: $scriptname <runlevel>" >&2
- exit 1
- fi
- previous=$PREVLEVEL
- [ "$previous" = "" ] && previous=N
- export runlevel previous
- if [ -f /etc/default/rcS ] ; then
- . /etc/default/rcS
- fi
- export VERBOSE
- if [ -f /lib/lsb/init-functions ] ; then
- . /lib/lsb/init-functions
- else
- log_action_msg() { echo $@; }
- log_failure_msg() { echo $@; }
- log_warning_msg() { echo $@; }
- fi
- #
- # Stub to do progress bar ticks (for splash programs) on startup
- #
- startup_progress() {
- # Avoid divide by zero if anyone moved xdm/kdm/gdm first in a runlevel.
- if [ 0 -eq "$num_steps" ] ; then return; fi
- step=$(($step + $step_change))
- progress=$(($step * $progress_size / $num_steps + $first_step))
- $debug splash_progress "$progress" || true
- }
- #
- # Check if we are able to use make like booting. It require the
- # insserv package to be enabled. Boot concurrency also requires
- # startpar to be installed.
- #
- if [ "none" != "$CONCURRENCY" ] ; then
- test -s /etc/init.d/.depend.boot || CONCURRENCY="none"
- test -s /etc/init.d/.depend.start || CONCURRENCY="none"
- test -s /etc/init.d/.depend.stop || CONCURRENCY="none"
- startpar -v > /dev/null 2>&1 || CONCURRENCY="none"
- fi
- #
- # Start script or program.
- #
- case "$CONCURRENCY" in
- startpar|shell) # shell is obsolete
- log_action_msg "Using startpar-style concurrent boot in runlevel $runlevel"
- startup() {
- action=$1
- shift
- scripts="$@"
- # Update progress bar counter and jump to the new position
- for script in $scripts ; do
- step=$(($step + $step_change))
- done
- [ -n "$scripts" ] && $debug startpar -a $action $scripts
- # Jump back one step to compencate for stepping one
- # time too many in the for loop.
- step=$(($step - $step_change))
- startup_progress
- }
- ;;
- makefile)
- log_action_msg "Using makefile-style concurrent boot in runlevel $runlevel"
- # The splash API is not handled with this CONCURRENCY mode
- startup() {
- eval "$(startpar -p 4 -t 20 -T 3 -M $1 -P $previous -R $runlevel)"
- if [ -n "$failed_service" ]
- then
- log_failure_msg "startpar: service(s) returned failure: $failed_service"
- fi
- if [ -n "$skipped_service" ]
- then
- log_warning_msg "startpar: service(s) skipped: $skipped_service"
- fi
- unset failed_service skipped_service
- }
- ;;
- none|*)
- startup() {
- action=$1
- shift
- scripts="$@"
- for script in $scripts ; do
- $debug "$script" $action
- startup_progress
- done
- }
- ;;
- esac
- # Check if the splash screen should be stopped before the given
- # script.
- is_splash_stop_scripts() {
- scriptname=$1
- case "$scriptname" in
- # killprocs is used in runlevel 1
- gdm|xdm|kdm|ltsp-client|ltsp-client-core|reboot|halt|killprocs)
- return 0
- ;;
- esac
- return 1
- }
- # Is there an rc directory for this new runlevel?
- if [ -d /etc/rc$runlevel.d ]
- then
- # Find out where in the progress bar the initramfs got to.
- PROGRESS_STATE=0
- if [ -f /dev/.initramfs/progress_state ]; then
- . /dev/.initramfs/progress_state
- fi
- # Split the remaining portion of the progress bar into thirds
- progress_size=$(((100 - $PROGRESS_STATE) / 3))
- case "$runlevel" in
- 0|6)
- ACTION=stop
- # Count down from 0 to -100 and use the entire bar
- first_step=0
- progress_size=100
- step_change=-1
- ;;
- S)
- ACTION=start
- # Begin where the initramfs left off and use 2/3
- # of the remaining space
- first_step=$PROGRESS_STATE
- progress_size=$(($progress_size * 2))
- step_change=1
- ;;
- *)
- ACTION=start
- # Begin where rcS left off and use the final 1/3 of
- # the space (by leaving progress_size unchanged)
- first_step=$(($progress_size * 2 + $PROGRESS_STATE))
- step_change=1
- ;;
- esac
- # Count the number of scripts we need to run
- # (for progress bars)
- num_steps=0
- for s in /etc/rc$runlevel.d/[SK]*; do
- if is_splash_stop_scripts "${s##/etc/rc$runlevel.d/S??}" ; then
- break
- fi
- num_steps=$(($num_steps + 1))
- done
- step=0
- if [ makefile = "$CONCURRENCY" ]
- then
- [ "$previous" != N ] && startup stop
- # First, run the KILL scripts.
- elif [ "$previous" != N ]
- then
- # Run all scripts with the same level in parallel
- CURLEVEL=""
- for s in /etc/rc$runlevel.d/K*
- do
- # Extract order value from symlink
- level=${s#/etc/rc$runlevel.d/K}
- level=${level%%[a-zA-Z]*}
- if [ "$level" = "$CURLEVEL" ]
- then
- continue
- fi
- CURLEVEL=$level
- SCRIPTS=""
- for i in /etc/rc$runlevel.d/K$level*
- do
- # Check if the script is there.
- [ ! -f $i ] && continue
- #
- # Find stop script in previous runlevel but
- # no start script there.
- #
- suffix=${i#/etc/rc$runlevel.d/K[0-9][0-9]}
- previous_stop=/etc/rc$previous.d/K[0-9][0-9]$suffix
- previous_start=/etc/rc$previous.d/S[0-9][0-9]$suffix
- #
- # If there is a stop script in the previous level
- # and _no_ start script there, we don't
- # have to re-stop the service.
- #
- [ -f $previous_stop ] && [ ! -f $previous_start ] && continue
- # Stop the service.
- SCRIPTS="$SCRIPTS $i"
- if is_splash_stop_scripts "$suffix" ; then
- $debug splash_stop || true
- fi
- done
- startup stop $SCRIPTS
- done
- fi
- if [ makefile = "$CONCURRENCY" ]
- then
- if [ S = "$runlevel" ]
- then
- startup boot
- else
- startup $ACTION
- fi
- else
- # Now run the START scripts for this runlevel.
- # Run all scripts with the same level in parallel
- CURLEVEL=""
- for s in /etc/rc$runlevel.d/S*
- do
- # Extract order value from symlink
- level=${s#/etc/rc$runlevel.d/S}
- level=${level%%[a-zA-Z]*}
- if [ "$level" = "$CURLEVEL" ]
- then
- continue
- fi
- CURLEVEL=$level
- SCRIPTS=""
- for i in /etc/rc$runlevel.d/S$level*
- do
- [ ! -f $i ] && continue
- suffix=${i#/etc/rc$runlevel.d/S[0-9][0-9]}
- if [ "$previous" != N ]
- then
- #
- # Find start script in previous runlevel and
- # stop script in this runlevel.
- #
- stop=/etc/rc$runlevel.d/K[0-9][0-9]$suffix
- previous_start=/etc/rc$previous.d/S[0-9][0-9]$suffix
- #
- # If there is a start script in the previous level
- # and _no_ stop script in this level, we don't
- # have to re-start the service.
- #
- if [ start = "$ACTION" ] ; then
- [ -f $previous_start ] && [ ! -f $stop ] && continue
- else
- # Workaround for the special
- # handling of runlevels 0 and 6.
- previous_stop=/etc/rc$previous.d/K[0-9][0-9]$suffix
- #
- # If there is a stop script in the previous level
- # and _no_ start script there, we don't
- # have to re-stop the service.
- #
- [ -f $previous_stop ] && [ ! -f $previous_start ] && continue
- fi
- fi
- SCRIPTS="$SCRIPTS $i"
- if is_splash_stop_scripts "$suffix" ; then
- $debug splash_stop || true
- fi
- done
- startup $ACTION $SCRIPTS
- done
- fi
- fi
- trap - EXIT # Disable emergency handler
- exit 0