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|
#!/bin/sh
### BEGIN INIT INFO
# Provides: dhcp-probe
# Required-Start: $local_fs $remote_fs $syslog $network
# Required-Stop: $local_fs $remote_fs $syslog $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: dhcp-probe daemon to survey DHCP/BootP server on LAN
# Description: Enable or disable dhcp-probe service
### END INIT INFO
set -e
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/dhcp_probe
LABEL=${DAEMON##*/}
NAME=dhcp-probe
PIDFILE=dhcp_probe.pid
BASE_RUNNING=/var/run
BASEPIDDIR=$BASE_RUNNING/$NAME
INITPIDFILE=$BASEPIDDIR/$PIDFILE
DESC="$NAME daemon"
ETC=/etc
LOGDIR=/var/log/$NAME.log
DODTIME=2
test -x $DAEMON || exit 0
if [ -r /lib/lsb/init-functions ]; then
. /lib/lsb/init-functions
fi
sourceable() {
[ -r $1 ] || return 1
# Just to temporary files created by VIM
case $1 in
*\~)
return 1
;;
esac
}
running() {
INTERFACE=$1
PIDFILE=$INITPIDFILE.$INTERFACE
_max_repeat=10
_repeat=1
while [ ! -r $PIDFILE ] && [ $_repeat -le $_max_repeat ]; do
printf "Waiting for pid file round: $_repeat\n" >&2
sleep 1
_repeat=$(($_repeat + 1))
done
printf "Waited ${_repeat}s to find a $INTERFACE pid file\n" >&2
if [ $_repeat -le $_max_repeat ]; then
read pid < $PIDFILE || return 1
fi
for i in `pidof dhcp_probe`; do
if [ "$i" = "$pid" ]; then
return 0
fi
done
return 1
}
start_daemon() {
# Start one daemon for each network interface
[ -d $BASEPIDDIR ] || mkdir -p $BASEPIDDIR || {
printf "Failed to create missing pid file directory $BASEPIDDIR!\n"
return 1
}
sts=0
for config_file in $ETC/$NAME/*; do
sourceable $config_file || continue
. $config_file
PIDFILE=$INITPIDFILE.$INTERFACE
DAEMON_OPTS="-T -p $PIDFILE $INTERFACE"
printf "Starting $DESC on interface $INTERFACE: "
max_repeat=10
repeat=1
while sleep 1; do
printf "\nstart_daemon - Waiting for an ip on iface $INTERFACE, round: $repeat" >&2
if ip address show dev "$INTERFACE" | grep -w 'inet' || [ $repeat -gt 10 ]; then
break
fi
repeat=$(( repeat + 1 ))
done
printf "\nwaited ${repeat}s to get an ip on $INTERFACE" >&2
start-stop-daemon --start --quiet --pidfile $PIDFILE \
--exec $DAEMON -- $DAEMON_OPTS
if running $INTERFACE; then
printf "Done.\n"
else
printf "Failed!\n"
sts=1
fi
done
return $sts
}
stop_daemon() {
# Stop all existing dhcp_probe daemon
for config_file in $ETC/$NAME/*; do
sourceable $config_file || continue
. $config_file
PIDFILE=$INITPIDFILE.$INTERFACE
if [ -r $PIDFILE ]; then
printf "Stopping $DESC on interface $INTERFACE: "
start-stop-daemon --stop --quiet --pidfile $PIDFILE
printf "$NAME.\n"
rm -f $PIDFILE
else
force_stop
fi
done
}
force_stop() {
# Forcefully kill the process
for config_file in $ETC/$NAME/*; do
sourceable $config_file || continue
. $config_file
PIDFILE=$INITPIDFILE.$INTERFACE
if [ -r "$PIDFILE" ]; then
if running $INTERFACE; then
start-stop-daemon -K 15 --quiet --pidfile $PIDFILE \
--exec $DAEMON -- $DAEMON_OPTS
# Is it really dead?
[ -z "$DODTIME" ] || sleep "$DODTIME"
if running $INTERFACE; then
start-stop-daemon -K 9 --quiet --pidfile $PIDFILE \
--exec $DAEMON -- $DAEMON_OPTS
[ "$DODTIME" ] || sleep "$DODTIME"
if running $INTERFACE; then
printf "Cannot kill $LABEL (pid=$pid)!\n"
exit 1
fi
fi
fi
else
killall `basename $DAEMON`
fi
rm -f $PIDFILE
done
}
case $1 in
start)
start_daemon
;;
stop)
stop_daemon
;;
force-stop)
for config_file in $ETC/$NAME/*; do
sourceable $config_file || continue
. $config_file
PIDFILE=$INITPIDFILE.$INTERFACE
printf "Forcefully stopping $DESC: "
force_stop
if ! running $INTERFACE; then
printf "$NAME on interface $INTERFACE.\n"
else
printf "Error !\n"
fi
done
;;
force-reload) # Need to be improved
printf "Reload operation is not supported -- use restart.\n"
exit 1
;;
restart)
printf "Restarting $DESC: "
stop_daemon
[ -z "$DODTIME" ] || sleep $DODTIME
start_daemon
printf "$NAME."
;;
status)
for config_file in $ETC/$NAME/*; do
sourceable $config_file || continue
. $config_file
PIDFILE=$INITPIDFILE.$INTERFACE
printf "$LABEL is "
if running $INTERFACE; then
printf "running on interface $INTERFACE.\n"
else
printf "not running.\n"
exit 1
fi
done
;;
*)
N=/etc/init.d/$NAME
printf "Usage: $N {start|stop|restart|status|force-stop}\n" >&2
exit 1
;;
esac
exit 0
|
