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|
#! /bin/bash
# rcS -- Help to boot the system into single user mode
# $Id: rcS,v 0.16 1999/11/20 14:14:20 hr Exp $
# Copyright (c) 1999 Richard Hawes <rhawes@dma.org>
# Martin Schulze <joey@debian.org>
# Winfried Trmper <winni@xpilot.org>
# Miquel van Smoorenburg <miquels@cistron.nl>
# Experimental: To tell the scripts they are not called manually.
export RC_VERSION="000.007"
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Ideas taken from rcS as provided by the sysvinit package and from
# the file-rc /etc/init.d/rc program
set -h
declare -x PATH="/sbin:/bin:/usr/sbin:/usr/bin" \
RUNLEVEL=S \
PREVLEVEL=N
umask 022
_WarnPause="2"
# FUNCTIONS
function _Get_Cmd() {
# read the file...
local sort_no off_levels on_levels cmd options
while read sort_no off_levels on_levels cmd options
do
case "$sort_no" in
"#*" | "") continue ;;
esac
[ ! -f "$cmd" ] && continue
eval "case $RUNLEVEL in ${on_levels//,/ | } ) echo $cmd ;; esac"
done
}
# Experimental: may be called by sourced scripts
# if RC_VERSION is null, source rc in source mode
function Warn() { # Error Handler
echo "$0:" "$@" >&2
echo -ne "\a"
sleep $_WarnPause
}
# debug mode
if [ -z "$INIT_VERSION" -a "$1" = "-D" ]
then
shift
if [ "$1" = "-X" ]
then
# trace
set -eux
shift
else
set -eu
fi
_Debug="echo"
# to time script, don't wait after error message
_WarnPause="0"
echo "debug note: will look for configuration files in the current directory"
_Etc="."
else
_Etc="/etc"
fi
_RcCache="$_Etc/runlevel.cache"
declare -a _RunCfg=("$_Etc/runlevel.conf" "$_Etc/runlevel.fallback")
#
# See if system needs to be setup.
#
if [ -x /sbin/unconfigured.sh ]
then
$_Debug /sbin/unconfigured.sh
fi
#
# Source defaults.
#
. /etc/default/rcS
export VERBOSE
#
# Trap CTRL-C &c only in this shell so we can interrupt
# subprocesses.
#
trap ":" INT QUIT TSTP
# read in startup list from cache if possible
_Ind="0"
_Mode="1"
function _Get_Start_Up () {
declare _cmd
. "$1";
for _cmd in $_START_UP
do
echo ${_CMD_LIST[$_cmd]}
done
}
function _Get_File () { File="${_RcCache}"; }
_MaxInd="0"
while :
do
_Get_File
if [ -s "$File" ]
then
_START_UP=""
if _START_UP="$(_Get_Start_Up $File)" && [ ${#_START_UP} -gt 0 ]
then
echo "Using ${File}."
break
else
Warn "$LINENO: No start up commands in $File."
fi
declare -p _CMD_LIST _ON_STATUS _OFF_STATUS _START_UP _START_LIST _STOP_LIST
else
Warn "$LINENO: file ${File} is missing."
fi
let _Ind+="1"
if [ "$_Ind" -gt "$_MaxInd" ] ; then
if [ "$_Mode" ] ; then
_Ind="0"
_Mode=""
_MaxInd="1"
function _Fix_Cmd () { :; }
function _Get_File () { File="${_RunCfg[$_Ind]}"; }
function _Get_Start_Up () { _Get_Cmd < $1; }
continue
else
Warn "$LINENO: startup is failing"
break
fi
fi
done
# unset functions so source scripts won't execute by accident
unset -f _Get_Cmd _Get_File _Get_Start_Up
# Execute the commands
set start
for _Cmd in $_START_UP
do
[ -x "$_Cmd" ] || continue
case "$_Cmd" in
*.sh)
# Source shell script for speed.
(
trap - INT QUIT TSTP
$_Debug . $_Cmd
)
;;
*)
# No sh extension, so fork subprocess.
$_Debug $_Cmd start
;;
esac
done
#
# For compatibility, run the files in /etc/rc.boot too.
#
[ -d /etc/rc.boot ] && $_Debug run-parts /etc/rc.boot
#
# Finish setup if needed.
#
if [ -x /sbin/setup.sh ]
then
$_Debug /sbin/setup.sh
fi
|