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dhcp
rc.dhcrelay
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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
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