Starting Script on boot

pazu · 02-18-2015, 08:19 PM

Hi all,

Hopefully its an easy fix, I'm trying to start a script at startup that will run forever (while system is online).

It is a SUSE base OS (Sophos UTM box), but I don't think that should matter too much.

I have a script, called statupdate

I have located it in /etc/init.d/

I have given it execute permissions

I have then put in a link to it under /etc/init.d/RC3.d/S99statupdate

This worked, but the system boot sequence never finished because the script started kept looping, preventing the system boot sequence to continue.

I then created another script called startupdate

that script simply started the main statupdate script. I tried with the following:

./statupdate &

OR

nohup ./statupdate &

I swapped out the S99statupdate with S99startupdate (and gave it execute permissions)

The exact same issue occured.

Can anyone point out what I'm doing wrong?

Cheers,
Pazu

chrism01 · 02-19-2015, 04:16 AM

1. post the script(s)
2. look at how other initscripts are written and copy the design

pazu · 02-19-2015, 04:28 AM

Actual script I want to run at boot is:

Code:

#!/bin/bash          
while :
do
IP='10.0.0.185'
DN=$(S=1; F=/sys/class/net/ppp0/statistics/rx_bytes; X=`cat $F`; sleep $S; Y=`cat $F`; BPS="$(((Y-X)/S))"; echo $BPS)
UP=$(S=1; F=/sys/class/net/ppp0/statistics/tx_bytes; X=`cat $F`; sleep $S; Y=`cat $F`; BPS="$(((Y-X)/S))"; echo $BPS)
CPU=$(uptime | grep -oh "load average: [0-9].[0-9][0-9]")
CPU=$(echo $CPU | sed -r 's/^.{14}//')
UPTIME=$(cat /proc/uptime)
UPTIME=$(echo $UPTIME | cut -f1 -d" ")
#echo $DN
#echo $UP
#echo $CPU
#echo $UPTIME
curl $IP/?$DN/$UP/$CPU/$UPTIME!
sleep 1
done

Current start script is:

Code:

#!/bin/bash          
./statupdate &

are you able to point me at other init scripts? I have had a look at some on the server itself, but they all seem way more complicated that I have seen posted online (albeit they work!)

pazu · 02-19-2015, 05:08 AM

I suspect I've completed missed the point of the init script, the skeleton/readme isn't on the box i'm working on so I got a tad lost.

If someone can point me in the direction of a step by step guide for init scripts that would be great.

I have found a few guides such as:

http://www.linux.com/learn/tutorials...h-init-scripts

https://en.opensuse.org/openSUSE:Packaging_init_scripts

But they both refer to the application or executable, can I just use the script i want to run as the executable?

Regards,
Pazu

pazu · 02-19-2015, 05:20 AM

I have tried the following but get an error 'unknown service' when trying to add with chkconfig

Code:

#!/bin/bash
#
# Run-level Startup script for the LCD Stat Updater
#
# chkconfig: 345 91 19
# description: Startup/Shutdown LCD Stat Updater

# if the executables do not exist -- display error

if [ ! -f /etc/init.d/statupdate ]
then
        echo "LCDStatusMon startup: cannot start"
        exit 1
fi

# depending on parameter -- startup, shutdown, restart 
# of the instance and listener or usage display 

case "$1" in
    start)
        # LCDStatusMon  startup
        echo -n "Starting LCD Status Monitor: "
        /etc/init.d/statupdate
        echo "OK"
        ;;
    stop)
 	# LCDStatusMon shutdown
        echo -n "Shutdown LCD Status Monitor: "
        pkill -f statupdate
        echo "OK"
        ;;
    reload|restart)
        $0 stop
        $0 start
        ;;
    *)
        echo "Usage: $0 start|stop|restart|reload"
        exit 1
esac
exit 0