Shell-execute does not execute my script

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Hi all,

I have a problem with shell execute. In fact I execute other scripts fine, but this one does not work.

My rule is executing “/usr/local/bin/gsm-dial-alarm”

This script looks like this:

#!/bin/sh

/usr/bin/minicom -D /dev/ttyUSB1 -S /home/pi/gsm-dial-alarm </dev/null >/dev/null 2>/dev/null

I am trying to redirect stdin and stdout to dev null. The script runs fine from the command line and produces no output and does not require input.

However in pimatic I get:

20:52:53.688 [pimatic] error: rule gsm-dial-alarm error executing an action: undefined
20:52:53.691 [pimatic] debug: undefined
20:52:53.693 [pimatic] error: Error on evaluation of rule condition of rule gsm-dial-alarm: undefined
20:52:53.695 [pimatic] debug: Error: Command failed: /bin/sh -c /usr/local/bin/gsm-dial-alarm
20:52:53.695 [pimatic] debug:>

Any help is highly appreciated!

tried with sudo already? THEN execute "sudo /usr/local/bin ..."

don’t know if it matters but you could also use the redirect like that > /dev/null 2>&1

Yes, I did try with sudo and I also tried various ways of redirecting stdout and stderr… No success so far.

I assume you run the script from the command line as normal user.
When run from pimatic the script is run under root (so you don’t need sudo at all,actually it is the other way round).

I think minicom uses settings from the configuration file .minirc.dfl in your /home/pi folder.
The root account doesn’t know/have this setings and therefore the command doesn’t run correctly.
That means you need to start the script and run as another user. As root user (and only as root user), you can use the runuser command like:
runuser -l userName -c /usr/local/bin/gsm-dial-alarm
where userName would most probably pi.

Thanks for the suggestion @Harry-van-der-Wolf. But I run the script using sudo as the user. I tried running it with doing “sudo su -” before. And it runs fine as root.

I found a workaround using “screen”.
Script 1 starts a screen session and executes my script2 within.

/usr/bin/screen -dmS gsm-dial-alarm
/usr/bin/screen -S gsm-dial-alarm -X stuff "/usr/local/bin/gsm-dial-alarm2\r"

Then at the end of my script2 it kills its own screen session.

/usr/bin/minicom -D /dev/ttyUSB1 -S /home/pi/gsm-dial-alarm </dev/null > /dev/null 2>&1

/usr/bin/screen -S gsm-dial-alarm -X kill

Cheers