rc.opendhcpd

Linux下的DHCP服务器程序源代码, 实现DHCP Server端协议

#!/bin/bash
#Start/stop opendhcpd
#Originally Contributed by sharne, slightly modified.
#######################################################################################################
#######################################################################################################
## This file daemonizes the opendhcpd to start automatically when system starts
##
## Please do the following (todo)
##
##  1) Add the following lines to /etc/rc.d/rc.inet2, at the end. Alternatively You can also add
##     these lines to rc.local or inittab files.
##
##	# Start the opendhcpd daemon:
##	if [ -x /etc/rc.d/rc.opendhcpd ]; then
##	  /etc/rc.d/rc.opendhcpd start
##	fi
##
##  2) Modify the opendhcpd_start() function in line 29 below, setting the file locations.
##
##  3) Change the permissions of this file rc.opendhcpd to 755 after moving it to /etc/rc.d
##
#######################################################################################################
#######################################################################################################
pidnum=$( ps -eaf | grep -v grep | grep -v rc.opendhcpd | grep opendhcpd | awk '{ printf("%s %s\n",$3,$2) }' | sort | head -1 | awk '{ print $2 }' )

# Start opendhcpd:
opendhcpd_start() {
##### Modify line below for location of executive and other files #####
/opt/opendhcp/opendhcpd -i /opt/opendhcp/opendhcpd.ini -l /opt/opendhcp/opendhcpd.log -s /opt/opendhcp/opendhcpd.state
echo "Server opendhcpd started"
}

# Stop opendhcpd:
opendhcpd_stop() {
kill $pidnum  
while [ true ]
do
pidnum=$( ps -eaf | grep -v grep | grep -v rc.opendhcpd | grep opendhcpd | awk '{ print $2 }' | head -1 )
if [ -z "$pidnum" ]
then
break
fi
done
echo "Server opendhcpd stopped"
}

case "$1" in
'start')
if [ -z "$pidnum" ]
then
opendhcpd_start
RETVAL=0
else
echo "Server is already running - Try restart"
RETVAL=1
fi
;;
'stop')
if [ -z "$pidnum" ]
then
echo "Server is not running"
RETVAL=1
else
opendhcpd_stop
RETVAL=0
fi
;;
'restart')
if [ -z "$pidnum" ]
then
echo "Server is not running"
opendhcpd_start
else
opendhcpd_stop
opendhcpd_start
fi
RETVAL=0
;;
'status')
if [ -z "$pidnum" ]
then
echo "Server is not running"
RETVAL=1
else
echo "Server is running - Pid : $pidnum"
RETVAL=0
fi
;;
*)
echo "Usage $0 { start | stop | restart | status }"
RETVAL=1
;;
esac
exit $RETVAL

# Enjoy!