File arpwatch.init of Package arpwatch.649

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File arpwatch.init of Package arpwatch.649

#!/bin/sh
# Copyright (c) 1995-2004 SUSE LINUX AG, Nuernberg, Germany.
# All rights reserved.
#
# Author: Roman Drahtmueller
#
# /etc/init.d/arpwatch
#
#   and symbolic its link
#
# /(usr/)sbin/rcarpwatch
#
# LSB compliant service control script; see http://www.linuxbase.org/spec/
# 
### BEGIN INIT INFO
# Provides: arpwatch
# Required-Start: $remote_fs $syslog
# Required-Stop:  $remote_fs $syslog
# Default-Start:  3 5
# Default-Stop:   0 1 2 6
# Description:    Start the arpwatch daemon
### END INIT INFO
# 
# Note on Required-Start: It does specify the init script ordering,
# not real dependencies. Depencies have to be handled by admin
# resp. the configuration tools (s)he uses.

# Check for missing binaries (stale symlinks should not happen)
ARPWATCH=/usr/sbin/arpwatch
test -x $ARPWATCH || exit 5

# Source arpwatch sysconfig settings
test -f /etc/sysconfig/arpwatch && . /etc/sysconfig/arpwatch

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     ditto but be verbose in local rc status
#      rc_status -v -r  ditto and clear the local rc status
#      rc_failed        set local and overall rc status to failed
#      rc_failed <num>  set local and overall rc status to <num><num>
#      rc_reset         clear local rc status (overall remains)
#      rc_exit          exit appropriate to overall rc status
#      rc_active        checks whether a service is activated by symlinks
. /etc/rc.status

# First reset status of this service
rc_reset

# Return values acc. to LSB for all commands but status:
# 0 - success
# 1 - generic or unspecified error
# 2 - invalid or excess argument(s)
# 3 - unimplemented feature (e.g. "reload")
# 4 - insufficient privilege
# 5 - program is not installed
# 6 - program is not configured
# 7 - program is not running
# 
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signalling is not supported) are
# considered a success.

case "$1" in
    start)
	ARPWATCH_STARTED=0
        echo -n "Starting arpwatch"
        for interface in $ARPWATCH_INTERFACE; do
          if /sbin/ifstatus $interface > /dev/null 2>&1; then
            DATFILE=/var/lib/arpwatch/arp.dat.$interface
            if [ ! -f "$DATFILE" ]; then
              /bin/cp -a /var/lib/arpwatch/arp.dat $DATFILE
            fi
            TEMP_ARGS="$ARPWATCH_ARGS -i $interface -f $DATFILE"
            $ARPWATCH $TEMP_ARGS
            ARPWATCH_STARTED=$(( $ARPWATCH_STARTED + 1 ))
          else
            echo "${attn} interface ${warn}$interface ${attn} is not ready.${norm}"
          fi
        done
        if [ "$ARPWATCH_STARTED" = 0 ]; then
          startproc $ARPWATCH $ARPWATCH_ARGS
        fi
        rc_status -v
        ;;
    stop)
        echo -n "Shutting down arpwatch"
        killproc -TERM $ARPWATCH
        rc_status -v
        ;;
    try-restart|condrestart)
        ## Do a restart only if the service was active before.
        ## Note: try-restart is now part of LSB (as of 1.9).
        ## RH has a similar command named condrestart.
        if test "$1" = "condrestart"; then
            echo "${attn} Use try-restart ${done}(LSB)${attn} rather than condrestart ${warn}(RH)${norm}"
        fi
        $0 status
        if test $? = 0; then
            $0 restart
        else
            rc_reset # Not running is not a failure.
        fi
        # Remember status and be quiet
        rc_status
        ;;
    restart)
        ## Stop the service and regardless of whether it was
        ## running or not, start it again.
        $0 stop
        $0 start

# Remember status and be quiet
        rc_status
        ;;
    force-reload)
        $0 reload
        ;;
    reload)
        # If it supports signalling:
        echo -n "Reload service arpwatch is not supported."
        rc_failed 3
        rc_status -v
        ;;
    status)
        echo -n "Checking for arpwatch: "
        ## Check status with checkproc(8), if process is running
        ## checkproc will return with exit status 0.

# Return value is slightly different for the status command:
        # 0 - service running
        # 1 - service dead, but /var/run/  pid  file exists
        # 2 - service dead, but /var/lock/ lock file exists
        # 3 - service not running

# NOTE: checkproc returns LSB compliant status values.
        checkproc $ARPWATCH
        rc_status -v
        ;;
    probe)
        echo -n "arpwatch has no config file. No probing possible"
        rc_failed 3
        rc_status -v

;;
    *)
        echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload|probe}"
        exit 1
        ;;
esac
rc_exit

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