Run commands/script after specific mac-address is connected

[DerDominik82]

Hi there,

what is the best way to run commands/script, after a specified mac-address is connected to the local network?

In the past I found a solution with adding a file in /etc/hotplug.d/dhcp which looks like this:

#!/bin/sh

if [ "$ACTION" = add ] || [ "$ACTION" = update ]; then
	if [ "$MACADDR" = xx:xx:xx:xx:xx:xx ]; then
		..commands..

	elif [ "$MACADDR" = yy:yy:yy:yy:yy:yy ]; then
		..another commands..
	fi
fi

One use case it is working without problems, but in my second case I want to execute a script on my OpenWRT, which doesnt't really work.
In this script there is some pre-checking and the base function is to ssh on a client und pushing a rsync-command, and from that point it stops.
But if I execute the script manually it is working without problems.

Maybe there's another way on OpenWRT to execute commands if a specific mac-address is connected? The script needs only to be executed once after coming up.

Thanks

[hnyman]

@DerDominik82

there is some pre-checking and the base function is to ssh on a client und pushing a rsync-command, and from that point it stops.
But if I execute the script manually it is working without problems.

You might try running the problematic script from a detached shell launched from the hotplug script. That might help if you commands actually expect console output/input.
See

Startup script

Double && means "run next the command after &&", and there should be a command on the line after && A single & would mean a detached process to be run on the background. I have a hunch that you are aiming for either php-cli -S 192.168.1.1:8088 -t /www & or (php-cli -S 192.168.1.1:8088 -t /www )& which would be a detached shell. Once of those might work for you if you want to keep the process run even after the script should complete. I would go with the latter version. Ps. google for …

Running startup scrpts

Try a detached shell: (/usr/bin/python3 /root/myscript.py -m option1 -r option2 )&

Run script on boot

hi guys I would like to start a script on boot sh /root/sms.sh on openwrt 19.07. this script has no end, it reads a file every 2 seconds. i tried with #! / bin / sh /etc/rc.common but it crashes the whole system .. how can I do ..?

[DerDominik82]

Thanks for your first help, it helps me for 1-2 further steps. But it's still strange.

I changed my dhcp-script like this:

#!/bin/sh
if [ "$ACTION" = add ] || [ "$ACTION" = update ]; then
	if [ "$MACADDR" = xx:xx:xx:xx:xx:xx ]; then
		sleep 1
		etherwake -i br-lan aa:aa:aa:aa:aa:aa

	elif [ "$MACADDR" = bb:bb:bb:bb:bb:bb ]; then
		if [ -f /tmp/qnap-log ]; then
			sleep 1
			rm /tmp/qnap-log
		fi
		if [ -f /tmp/rsync_1 ]; then
			sleep 1
			rm /tmp/rsync*
		fi
		sleep 1
		(/root/script_qnap/qnap.sh > /tmp/qnap-log) &
    sleep 5
	fi
fi

First part is working, second executes a sesond script with integrated ssh-rsync commands.
In this second script it looks like this after the pre-checks (as mentioned before)

#!/bin/sh
	sleep 1
	(ssh admin@192.168.99.8 -p 2222 "/share/HDA_DATA/.qpkg/Entware-ng/bin/rsync -Pvarzz rsync://192.168.99.6/sharesource-a /sharetarget-a" > /tmp/rsync_1);
	sleep 1
	echo $(date +"%d.%m.%Y %T")": Wait time ended, Rsync folder ebooks"
	sleep 1
	(ssh admin@192.168.99.8 -p 2222 "/share/HDA_DATA/.qpkg/Entware-ng/bin/rsync -Pvarzz rsync://192.168.99.6/sharesource-b /sharetarget-b" > /tmp/rsync_2);
	sleep 1

Additional I created a seperate test-script for testing the routine

#!/bin/sh

if [ -f /tmp/qnap-log ]; then
	sleep 1
	rm /tmp/qnap-log
fi
if [ -f /tmp/rsync_1 ]; then
	sleep 1
	rm /tmp/rsync*
fi
sleep 1
(/root/script_qnap/qnap.sh > /tmp/qnap-log) &
sleep 5

After executing the last test-script it starts the main-script and it runs through (also visible in the generated logs).
But if the mains script is executed by the dhcp-script it runs through, but the ssh-rsync commands directly aborts (log is generated, but no content).
Don't really understand as from my point of view the execution of the main script should be the same?!