This is init file save it as myservice.sh at
/etc/init.d
#!/bin/sh
### BEGIN INIT INFO
# Provides: myservice
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Put a short description of the service here
# Description: Put a long description of the service here
### END INIT INFO
# Change the next 3 lines to suit where you install your script and what you want to call it
DIR=/usr/local/bin/myservice
DAEMON=$DIR/myservice.py
DAEMON_NAME=myservice
# Add any command line options for your daemon here
DAEMON_OPTS=""
# This next line determines what user the script runs as.
# Root generally not recommended but necessary if you are using the Raspberry Pi GPIO from Python.
DAEMON_USER=root
# The process ID of the script when it runs is stored here:
PIDFILE=/var/run/$DAEMON_NAME.pid
. /lib/lsb/init-functions
do_start () {
log_daemon_msg "Starting system $DAEMON_NAME daemon"
start-stop-daemon --start --background --pidfile $PIDFILE --make-pidfile --user $DAEMON_USER --chuid $DAEMON_USER --startas $DAEMON -- $DAEMON_OPTS
log_end_msg $?
}
do_stop () {
log_daemon_msg "Stopping system $DAEMON_NAME daemon"
start-stop-daemon --stop --pidfile $PIDFILE --retry 10
log_end_msg $?
}
case "$1" in
start|stop)
do_${1}
;;
restart|reload|force-reload)
do_stop
do_start
;;
status)
status_of_proc "$DAEMON_NAME" "$DAEMON" && exit 0 || exit $?
;;
*)
echo "Usage: /etc/init.d/$DAEMON_NAME {start|stop|restart|status}"
exit 1
;;
esac
exit 0 Then create myservice.py file at /usr/local/bin/myservice . and also create output.txt file in the same directory. change permission by chmod 777 myservice.py
import sys, struct
from socket import *
SIZE = 1024 # packet size
hostName = gethostbyname('0.0.0.0')
mySocket = socket( AF_INET, SOCK_DGRAM )
mySocket.bind((hostName,18736))
repeat = True
while repeat:
(data,addr) = mySocket.recvfrom(SIZE)
data = struct.unpack('d',data)
data=int(data[0])
file = open("output.txt", "w")
file.write(str(data))
file.close() sudo nano /etc/rc.local
then add bellow line before exit line in rc.local
sudo /etc/init.d/myservice.sh start
you can also manually start your Python script using the command
sudo /etc/init.d/myservice.sh start
check its status with the
sudo /etc/init.d/myservice.sh status
stop it with
sudo /etc/init.d/myservice.sh stop
