executeCommandLine not working in OH4

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1

Hi,

i want to update my OH2 running on a Raspi in my camper to OH4 and have some issues with the executeCommandLine command. in OH2 it worked like this…

rule “Nachtmodus”
when
Item Nachtmodus changed to ON
then
executeCommandLine(“/etc/openhab2/scripts/changeBrightness.sh 20”)
end

the script changes a value in a file

for OH4 i know, that i have to change the command. it looks now like this…

executeCommandLine(Duration.ofSeconds(5), “changeBrightness.sh”, “20”)

i copied the script in /usr/local/bin, so its executable from everywehre without “bash”, and exery user is allowed to execute it.

whats wrong?

thanks in advance!

2

Are you sure that the PATH variable for the openhab user is containing /usr/local/bin ?
It doesn’t hurt to use the full path.
Use the return value of the function executeCommandLine and log it to openhab.log then you get an idea about what is going wrong.

3

even with path ist not working.

executeCommandLine(Duration.ofSeconds(5), “/usr/local/bin/changeBrightness.sh”, “20”)

how can i log? i dont get an return value, i just want to overwrite a value in a file.
the skript looks like this.

#!/bin/bash
echo $1 > /home/openhabian/Desktop/20

if i execute it in the terinal everything works fine.

4

User openhab has enough privileges to write to that file ?
For a trial put that file on /tmp and give it 777 permission.

var ScriptResponse = executeCommandLine(Duration.ofSeconds(60), "path/to/my/script.sh");

ScriptResponse then can be logged.
e.g.

logError("foobar", "This is an error: {}", ScriptResponse )
5

Sorry, now i got it with the logging.

2023-09-11 20:20:59.736 [INFO ] [penhab.core.model.script.Exec Result] - /usr/local/bin/changeBrightness.sh: line 3: /home/openhabian/Desktop/20: Permission denied

the file i wanted to change was not allowed to change.

Thanks for the hint with th log!!!

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