|
@@ -1,251 +0,0 @@
|
|
-<sect1 id="ch07-rc">
|
|
|
|
-<title>Creating the rc script</title>
|
|
|
|
-<?dbhtml filename="rc.html" dir="chapter07"?>
|
|
|
|
-
|
|
|
|
-<para>The first main boot script is the <filename>/etc/init.d/rc</filename>
|
|
|
|
-script. Create the <filename>/etc/init.d/rc</filename> script by running the
|
|
|
|
-following command:</para>
|
|
|
|
-
|
|
|
|
-<para><screen><userinput>cat > /etc/init.d/rc << "EOF"</userinput>
|
|
|
|
-#!/bin/sh
|
|
|
|
-# Begin /etc/init.d/rc
|
|
|
|
-#
|
|
|
|
-# By Jason Pearce - jason.pearce@linux.org
|
|
|
|
-# Modified by Gerard Beekmans - gerard@linuxfromscratch.org
|
|
|
|
-# print_error_msg based on ideas by Simon Perreault -
|
|
|
|
-# nomis80@videotron.ca
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# Include the functions declared in the /etc/init.d/functions file
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
-source /etc/init.d/functions
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# The print_error_msg function prints an error message when an unforeseen
|
|
|
|
-# error occurred that wasn't trapped for some reason by a evaluate_retval
|
|
|
|
-# call or error checking in different ways.
|
|
|
|
-
|
|
|
|
-print_error_msg()
|
|
|
|
-{
|
|
|
|
-
|
|
|
|
- echo
|
|
|
|
- $FAILURE
|
|
|
|
- echo -n "You should not read this error message. It means "
|
|
|
|
- echo "that an unforeseen error "
|
|
|
|
- echo -n "took place and subscript $i exited with "
|
|
|
|
- echo "a return value "
|
|
|
|
- echo -n "of $error_value for an unknown reason. If you're able "
|
|
|
|
- echo "to trace this error down "
|
|
|
|
- echo -n "to a bug in one of the files provided by this book, "
|
|
|
|
- echo "please be so kind to "
|
|
|
|
- echo -n "inform us at lfs-dev@linuxfromscratch.org"
|
|
|
|
- $NORMAL
|
|
|
|
- echo
|
|
|
|
- echo
|
|
|
|
- echo "Press a key to continue..."
|
|
|
|
- read
|
|
|
|
-
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# If you uncomment the debug variable below none of the scripts will be
|
|
|
|
-# executed, just the script name and parameters will be echo'ed to the
|
|
|
|
-# screen so you can see how the scripts are called by rc.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
-# Un-comment the following for debugging.
|
|
|
|
-# debug=echo
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# Start script or program.
|
|
|
|
-#
|
|
|
|
-startup() {
|
|
|
|
-
|
|
|
|
- $debug "$@"
|
|
|
|
-
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# Ignore CTRL-C only in this shell, so we can interrupt subprocesses.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
-trap ":" INT QUIT TSTP
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# Now find out what the current and what the previous runlevel are. The
|
|
|
|
-# $RUNLEVEL variable is set by init for all it's children. This script
|
|
|
|
-# runs as a child of init.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
-runlevel=$RUNLEVEL
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# Get first argument. Set new runlevel to this argument. If no runlevel
|
|
|
|
-# was passed to this script we won't change runlevels.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
-[ "$1" != "" ] && runlevel=$1
|
|
|
|
-if [ "$runlevel" = "" ]
|
|
|
|
-then
|
|
|
|
- echo "Usage: $0 <runlevel>" >&2
|
|
|
|
- exit 1
|
|
|
|
-fi
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# The same goes for $PREVLEVEL (see above for $RUNLEVEL). previous will
|
|
|
|
-# be set to the previous run level. If $PREVLEVEL is not set it means
|
|
|
|
-# that there is no previous runlevel and we'll set previous to N.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
-previous=$PREVLEVEL
|
|
|
|
-[ "$previous" = "" ] && previous=N
|
|
|
|
-
|
|
|
|
-export runlevel previous
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# Is there an rc directory for the new runlevel?
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
-if [ -d /etc/rc$runlevel.d ]
|
|
|
|
-
|
|
|
|
-then
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# If so, first collect all the K* scripts in the new run level.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- if [ $previous != N ]
|
|
|
|
- then
|
|
|
|
- for i in /etc/rc$runlevel.d/K*
|
|
|
|
- do
|
|
|
|
- [ ! -f $i ] && continue
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# the suffix variable will contain the script name without the leading
|
|
|
|
-# Kxxx
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- suffix=${i#/etc/rc$runlevel.d/K[0-9][0-9][0-9]}
|
|
|
|
-#
|
|
|
|
-# If there is a start script for this K script in the previous runlevel
|
|
|
|
-# determine what it's full path is
|
|
|
|
-#
|
|
|
|
- previous_start=/etc/rc$previous.d/S[0-9][0-9][0-9]$suffix
|
|
|
|
-#
|
|
|
|
-# If there was no previous run level it could be that something was
|
|
|
|
-# started in rcS.d (sysinit level) so we'll determine the path for that
|
|
|
|
-# possibility as well.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- sysinit_start=/etc/rcS.d/S[0-9][0-9][0-9]$suffix
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# Stop the service if there is a start script in the previous run level
|
|
|
|
-# or in the sysinit level. If previous_start or sysinit_start do not
|
|
|
|
-# exist the 'continue' command is run which causes the script to abort
|
|
|
|
-# this iteration of the for loop and continue with the next iteration.
|
|
|
|
-# This boils down to that it won't run the commands after the next two
|
|
|
|
-# lines and start over from the top of this for loop. See man bash for
|
|
|
|
-# more info on this.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- [ ! -f $previous_start ] &&
|
|
|
|
- [ ! -f $sysinit_start ] && continue
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# If we found previous_start or sysinit_start, run the K script
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- startup $i stop
|
|
|
|
- error_value=$?
|
|
|
|
-#
|
|
|
|
-# If the return value of the script is not 0, something went wrong with
|
|
|
|
-# error checking inside the script. the print_error_msg function will be
|
|
|
|
-# called and the message plus the return value of the K script will be
|
|
|
|
-# printed to the screen
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- if [ $error_value != 0 ]
|
|
|
|
- then
|
|
|
|
- print_error_msg
|
|
|
|
- fi
|
|
|
|
-
|
|
|
|
- done
|
|
|
|
- fi
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# Now run the START scripts for this runlevel.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- for i in /etc/rc$runlevel.d/S*
|
|
|
|
- do
|
|
|
|
- [ ! -f $i ] && continue
|
|
|
|
-
|
|
|
|
- if [ $previous != N ]
|
|
|
|
- then
|
|
|
|
-#
|
|
|
|
-# Find start script in previous runlevel and stop script in this
|
|
|
|
-# runlevel.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- suffix=${i#/etc/rc$runlevel.d/S[0-9][0-9][0-9]}
|
|
|
|
- stop=/etc/rc$runlevel.d/K[0-9][0-9][0-9]$suffix
|
|
|
|
- previous_start=/etc/rc$previous.d/S[0-9][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; abort this
|
|
|
|
-# iteration and start the next one.
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- [ -f $previous_start ] && [ ! -f $stop ] &&
|
|
|
|
- continue
|
|
|
|
- fi
|
|
|
|
-
|
|
|
|
- case "$runlevel" in
|
|
|
|
- 0|6)
|
|
|
|
-
|
|
|
|
-#
|
|
|
|
-# levels 0 and 6 are halt and reboot levels. We don't really start
|
|
|
|
-# anything here so we call with the 'stop' parameter
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- startup $i stop
|
|
|
|
- error_value=$?
|
|
|
|
-#
|
|
|
|
-# If the return value of the script is not 0, something went wrong with
|
|
|
|
-# error checking inside the script. the print_error_msg function will be
|
|
|
|
-# called and the message plus the return value of the K script will be
|
|
|
|
-# printed to the screen
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- if [ $error_value != 0 ]
|
|
|
|
- then
|
|
|
|
- print_error_msg
|
|
|
|
- fi
|
|
|
|
- ;;
|
|
|
|
- *)
|
|
|
|
- startup $i start
|
|
|
|
- error_value=$?
|
|
|
|
-#
|
|
|
|
-# If the return value of the script is not 0, something went wrong with
|
|
|
|
-# error checking inside the script. the print_error_msg function will be
|
|
|
|
-# called and the message plus the return value of the K script will be
|
|
|
|
-# printed to the screen
|
|
|
|
-#
|
|
|
|
-
|
|
|
|
- if [ $error_value != 0 ]
|
|
|
|
- then
|
|
|
|
- print_error_msg
|
|
|
|
- fi
|
|
|
|
- ;;
|
|
|
|
- esac
|
|
|
|
- done
|
|
|
|
-fi
|
|
|
|
-
|
|
|
|
-# End /etc/init.d/rc
|
|
|
|
-<userinput>EOF</userinput></screen></para>
|
|
|
|
-
|
|
|
|
-</sect1>
|
|
|
|
-
|
|
|