Subversion Repositories configs

#!/bin/bash
# 
# netconsole    This loads the netconsole module with the configured parameters.
#
# chkconfig: - 11 89
# description: Initializes network console logging
# config: /etc/sysconfig/netconsole
#
# Copyright 2002 Red Hat, Inc.
#
# Based in part on a shell script by
# Andreas Dilger <adilger@turbolinux.com>  Sep 26, 2001

PATH=/sbin:/usr/sbin:$PATH
RETVAL=0
SERVER_ADDRESS_RESOLUTION=

# Check that networking is up.
. /etc/sysconfig/network

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

# Default values
LOCALPORT=6666
DEV=

SYSLOGADDR=
SYSLOGPORT=514
SYSLOGMACADDR=

kernel=$(uname -r | cut -d. -f1-2)

usage ()
{
        echo $"Usage: $0 {start|stop|status|restart|condrestart}" 1>&2
        RETVAL=2
}

print_address_info ()
{
        local host=$1
        local route via target

        route=$(LANG=C ip -o route get to $host/32)
        
        [ -z "$DEV" ] && DEV=$(echo $route | sed "s|.* dev \([^ ]*\).*|\1|")
        echo "DEV=$DEV"
        echo "LOCALADDR=$(echo $route | sed "s|.* src \([^ ]*\).*|\1|")"
        if [[ $route == *" via "* ]] ; then
                via=$(echo $route | sed "s|.* via \([^ ]*\).*|\1|")
                target=$via
        else
                target=$host
        fi
        if [ -z "$SYSLOGMACADDR" ]; then
                arp=$(LANG=C /sbin/arping -f -c 1 -I $DEV $target 2>/dev/null | awk '/ reply from .*[.*]/ { print gensub(".* reply from .* \\[(.*)\\].*","\\1","G"); exit }')
                [ -n "$arp" ] && echo "SYSLOGMACADDR=$arp"
        fi      
}       
        
start ()
{
        [ -f /etc/sysconfig/netconsole ] || exit 6
        . /etc/sysconfig/netconsole

        SYSLOGOPTS=
        # syslogd server, if any
        if [ -n "$SYSLOGADDR" ]; then
                # IPv6 regex also covers 4to6, zero-compressed, and link-local addresses with zone-index addresses.
                # It should also cover IPv4-embedded, IPv4-mapped, and IPv4-translated IPv6 addresses.
                # Taken from: http://stackoverflow.com/a/17871737/3481531
                IPv4_regex="^([0-9]{1,3}\.){3}[0-9]{1,3}$"
                IPv6_regex="^(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))$"
                if ! [[ "$SYSLOGADDR" =~ $IPv4_regex ]] && ! [[ "$SYSLOGADDR" =~ $IPv6_regex ]]; then
                        # Use IPv4 by default:
                        SYSLOGADDR="$(LANG=C getent ahostsv4 $SYSLOGADDR 2> /dev/null)"

                        # Try IPv6 in case IPv4 resolution has failed:
                        if [[ $? -eq 2 ]]; then
                                SYSLOGADDR="$(LANG=C getent ahostsv6 $SYSLOGADDR 2> /dev/null)"
                        fi

                        if [[ $? -ne 0 ]]; then
                                echo $"Unable to resolve IP address specified in /etc/sysconfig/netconsole" 1>&2
                                exit 6
                        fi

                        SYSLOGADDR="$(echo "$SYSLOGADDR" | head -1 | cut --delimiter=' ' --fields=1)"
                fi
        fi
        if [ -z "$SYSLOGADDR" ] ; then
                echo $"Server address not specified in /etc/sysconfig/netconsole" 1>&2
                exit 6
        fi
        eval $(print_address_info $SYSLOGADDR)
        
        if [ -z "$SYSLOGMACADDR" ]; then
                echo $"netconsole: can't resolve MAC address of $SYSLOGADDR" 1>&2
                exit 1
        fi

        SYSLOGOPTS="netconsole=$LOCALPORT@$LOCALADDR/$DEV,$SYSLOGPORT@$SYSLOGADDR/$SYSLOGMACADDR "

        /usr/bin/logger -p daemon.info -t netconsole: inserting netconsole module with arguments \
        $SYSLOGOPTS
        if [ -n "$SYSLOGOPTS" ]; then
                action $"Initializing netconsole" modprobe netconsole \
                        $SYSLOGOPTS
                [ "$?" != "0" ] && RETVAL=1
        fi
        touch /var/lock/subsys/netconsole
}

stop ()
{
        if /sbin/lsmod | grep netconsole >/dev/null 2>&1 ; then
            action $"Disabling netconsole" rmmod netconsole;
            [ "$?" != "0" ] && RETVAL=1
        fi

        rm -f /var/lock/subsys/netconsole
}

status ()
{
        if /sbin/lsmod | grep netconsole >/dev/null 2>&1 ; then
                echo $"netconsole module loaded"
                RETVAL=0
        else
                echo $"netconsole module not loaded"
                RETVAL=3
        fi
}


restart ()
{
        stop
        start
}

condrestart ()
{
        [ -e /var/lock/subsys/netconsole ] && restart
}


case "$1" in
    stop) stop ;;
    status) status ;;
    start|restart|reload|force-reload) restart ;;
    condrestart) condrestart ;;
    *) usage ;;
esac

exit $RETVAL