executeCommandLine on a .sh script doesn't do anything

Setup, Configuration and Use Scripts & Rules
1

Hello,
I’m trying to run an script file from an executeCommandLine in my OpenHAB rules. The log shows that it saw the push button and executed the command, but I don’t think it’s actually running the shell script. Here’s what I have:

rule "frm_off_rule"
        when
                Item itm_frm_off received update
        then
                executeCommandLine("/home/pi/scripts/run_test.sh")
end

The <run_test.sh> looks like this:

pi@raspberrypi:~/scripts $ cat run_test.sh 
mosquitto_pub -h localhost -t 'teststart' -m '1'

I’ve tried running the script file and I do indeed see the MQTT publish, so there’s nothing wrong with the script.

I see the log file trying to execute the script

2018-04-16 11:45:52.451 [INFO ] [lipse.smarthome.io.net.exec.ExecUtil] - executed commandLine ‘bash /home/pi/scripts/run_test.sh’

I’ve tried adding sudo in a few places - in the script before the mosquitto_sub, and also adding it inside the executeCommandLine itself. I’ve tried adding bash in the command too.

executeCommandLine("sudo /home/pi/scripts/run_test.sh")
executeCommandLine("bash /home/pi/scripts/run_test.sh")

But that doesn’t help. I have another Pi running Raspbian that uses the same setup, and that one works. Looking through the forum posts, this seems to happen, but it’s a mystery why it happens. Any tips?

2

sudo probably doesn’t work since you have to enter your password there…

is run_test.sh owned by the same user as openhab runs on (probably openhab)…?

3

How did you run the script? did you use ‘sh scriptname’ or ‘./scriptname’? The reason for asking is that the ‘sh’ method is tolerant of non-unix type files, whereas the direct execution mode isn’t. This usually happens when you’ve edited the script on a windows machine, and copied it to your Linux machine. If this is the case, you can use vim to fix it, with the command :set ff=unix.

4

I guess, openHAB runs as user openhab, while you are executing your script as pi. The script is also located in pi’s home folder.

Please check:

  • the user which runs openHAB
  • run the script as this user
5

My guess is that you need to add a shebang to the top of the file:

#! /bin/bash
mosquitto_pub -h localhost -t 'teststart' -m '1'

And make sure that the OpenHAB user has execute-permissions.

sudo chmod +x /home/pi/scripts/run_test.sh
6

If the purpose of this script is to just publish an MQTT message you should be using the MQTT Action or MQTT Binding, not a shell script.

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