File rc.dhcrelay of Package dhcp
#! /bin/sh
# Copyright (c) 1996, 1997, 1998 S.u.S.E. GmbH
# Copyright (c) 1998, 1999, 2000, 2001 SuSE GmbH
# Copyright (c) 2002 SuSE Linux AG
# Copyright (c) 2003-2010 SUSE LINUX Products GmbH
#
# Author: Peter Poeml <poeml@suse.de>, 2001
# Marius Tomaschewski <mt@suse.de>, 2010
#
# /etc/init.d/dhcrelay
# and its symbolic link
# /usr/sbin/rcdhcrelay
#
### BEGIN INIT INFO
# Provides: dhcrelay
# Required-Start: $network $remote_fs network-remotefs
# Should-Start: $named $syslog $time
# Required-Stop: $network $remote_fs network-remotefs
# Should-Stop: $named $syslog
# Default-Start: 3 5
# Default-Stop: 0 1 2 6
# Short-Description: DHCP Relay
# Description: Start DHCP (Dynamic Host Configuration Protocol)
# relay agent, forwarding DHCP requests from one
# physical network segment to another.
### END INIT INFO
DHCPv_OPT=-4
DAEMON="ISC DHCPv4 relay agent"
DAEMON_BIN=/usr/sbin/dhcrelay
DAEMON_CONF=/etc/sysconfig/dhcrelay
DAEMON_PIDFILE=/var/run/dhcrelay.pid
STARTPROC_LOGFILE=/var/log/rc.dhcrelay.log
SUPPORTS_HUP="no"
test -s "$DAEMON_CONF" && . "$DAEMON_CONF"
if ! [ -x "$DAEMON_BIN" ]; then
case $1 in
stop) ;;
*) echo -n >&2 "$0: \"$DAEMON_BIN\" is not an executable file. Exiting."
case $1 in
status) rc_failed 4 ;;
*) rc_failed 5 ;;
esac
rc_status -v
;;
esac
rc_exit
fi
# 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
. /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)
echo -n "Starting $DAEMON"
checkproc -p $DAEMON_PIDFILE $DAEMON_BIN && {
echo -n "... already running"; rc_status -v; exit 0;
}
## If interfaces or servers are not set, skip starting of dhcrelay
## and return with "program not configured"
if [ -z "$DHCRELAY_INTERFACES" -o -z "$DHCRELAY_SERVERS" ]; then
# Tell the user this has skipped
rc_status -s
# service is not configured
exit 6;
fi
DHCRELAY_INTERFACES_ARGS=''
for i in $DHCRELAY_INTERFACES ; do
DHCRELAY_INTERFACES_ARGS="$DHCRELAY_INTERFACES_ARGS -i $i"
done
## Start daemon with startproc(8). If this fails
## the echo return value is set appropriate.
# startproc should return 0, even if service is
# already running to match LSB spec.
test "$2" = "-v" && echo -en \
"\nexecuting '$DAEMON_BIN $DHCPv_OPT $DHCRELAY_OPTIONS $DHCRELAY_INTERFACES_ARGS $DHCRELAY_SERVERS'"
startproc -q -l $STARTPROC_LOGFILE -p $DAEMON_PIDFILE $DAEMON_BIN $DHCPv_OPT $DHCRELAY_OPTIONS $DHCRELAY_INTERFACES_ARGS $DHCRELAY_SERVERS &>/dev/null
rc=$?
if ! [ $rc -eq 0 ]; then
## be verbose
echo ""
echo -n " please see $STARTPROC_LOGFILE for details "
## set status to failed
rc_failed
fi
# Remember status and be verbose
rc_status -v
;;
stop)
echo -n "Shutting down $DAEMON"
## Stop daemon with killproc(8) and if this fails
## set echo the echo return value.
killproc -p $DAEMON_PIDFILE $DAEMON_BIN
# Remember status and be verbose
rc_status -v
;;
try-restart)
## 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.
$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
sleep 1
$0 start
# Remember status and be quiet
rc_status
;;
force-reload)
## Signal the daemon to reload its config. Most daemons
## do this on signal 1 (SIGHUP).
## If it does not support it, restart.
$0 stop && sleep 1 && $0 start
rc_status
echo -n "Reload service $DAEMON"
if [ "$SUPPORTS_HUP" = "yes" ] ; then
killproc -p $DAEMON_PIDFILE -HUP $DAEMON_BIN
#touch $DAEMON_PIDFILE
rc_status -v
else
$0 stop && $0 start
rc_status
fi
;;
reload)
## Like force-reload, but if daemon does not support
## signalling, do nothing (!)
if [ "$SUPPORTS_HUP" = "yes" ] ; then
# If it supports signalling:
echo -n "Reload service $DAEMON"
killproc -p $DAEMON_PIDFILE -HUP $DAEMON_BIN
#touch $DAEMON_PIDFILE
rc_status -v
else
## Otherwise if it does not support reload:
rc_failed 3
rc_status -v
fi
;;
status)
echo -n "Checking for dhcp relay agent: "
## Check status with checkproc(8), if process is running
## checkproc will return with exit status 0.
# Status has a 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 -p $DAEMON_PIDFILE $DAEMON_BIN
rc_status -v
;;
probe)
## Optional: Probe for the necessity of a reload,
## give out the argument which is required for a reload.
if [ "$DAEMON_CONF" -nt "$DAEMON_PIDFILE" ]; then
if [ "$SUPPORTS_HUP" = "yes" ]; then
echo reload
else
echo restart
fi
fi
;;
*)
echo "Usage: $0 {start|stop|status|try-restart|restart|force-reload|reload|probe} [-v]"
exit 1
;;
esac
rc_exit
