Shell scripts works via command line, not via web interface

Installation Home Assistant OS
1

I’m using hass.io installed on a RPI3 to control kodi media center and can’t get shell commands to work.

I set up my ssh keys and created a script called kodivapor.sh:

#!/bin/bash

# robottv = 192.168.0.30
/usr/bin/ssh -i "/config/.ssh/id_rsa" [email protected] '/usr/bin/kodi-send --action="Slideshow(/storage/videos/vaporwave/,[,recursive,random,])"'

# loungeboombox = 192.168.0.31

/usr/bin/ssh -i "/config/.ssh/id_rsa" [email protected] '/usr/bin/kodi-send --action="Slideshow(/storage/videos/vaporwave/,[,recursive,random,])"'

This runs from the command line without any prompts just fine. But it won’t launch from the web interface.

Error in the home-assistant.log
2018-07-01 19:43:11 ERROR (MainThread) [homeassistant.components.shell_command] Error running command: /config/shellscripts/kodivapor.sh, return code: 255
NoneType: None

configuration.yaml

shell_command:
  vaporwave: "/config/shellscripts/kodivapor.sh"

scripts.yaml

'vaporparty':
  alias: vapor_party
  sequence: 
  - alias: vapor party test
    service: shell_command.vaporwave

What am I missing? Is it because when I ssh in I’m running as root, but the web interface runs as a different user? I’ve seen others say use the homeassistant user, but that one doesn’t exist on my system.

2

I have the same issue. Following command works fine when run manually from my Pi (Hass.io):

ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i /root/.ssh/id_rsa [email protected] source scripts/evening_shutdown.sh

But if HA runs this via a shell_command I get this error:

Error running command: `ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i /root/.ssh/id_rsa [email protected] source scripts/evening_shutdown.sh`, return code: 255

NoneType: None
3

you need to check your permissions on that shell command. if the homeassistant user doesn’t have execute permissions you will get an error.

4

@finity thanks for your reply. Won’t the user be root as specified in the command? Or are you saying there’s a separate homeassistant user?

I don’t see why it would work when run directly from the Pi’s shell but not the same command in a HA script.

6

with Hass.io try warping the commands in a python script see

(long post look for local scripts)

Had real problems running shell scripts in Hass.io, may help :slight_smile:

7

Thanks @lonebaggie. I created a /config/shutdown_wrapper.py script that runs the command:

import subprocess
import sys
params = sys.argv[1]
cmd = "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i /root/.ssh/id_rsa [email protected] 'sh /Users/alec/scripts/evening_shutdown.sh'"
x = subprocess.check_output(cmd, shell=True)
print(x.decode("utf-8"))

And call it from my shutdown_macbook shell command:

shell_command:
  shutdown_macbook: 'python3 /config/shutdown_wrapper.py'

But I get a generic error:

Error running command: `python3 /config/shutdown_wrapper.py`, return code: 1
NoneType: None

I notice python3 isn’t available when I SSH into my Pi to test this command manually. I assume it’s available in this “HA shell command” context though?

Anyway all seems a bit much just to run an SSH command from Hass.io!

8

I know nightmare . Your not passing any parameters so get rid of the params = line

not at my HA at the moment will check tomorrow for correct syntax to see if possible

9

Solved this, turns out the problem was the shutdown command within my evening_shutdown.sh script :persevere:

I had this (the -P caused the error):

sudo shutdown -P now

Instead of this:

sudo shutdown -h now

But in fact, since my Mac stays logged in when I leave it (a limitation of the following approach) I use this now to shut down more gracefully:

osascript -e 'tell app "System Events" to shut down'

Not only that, but it works outside the Python script so now my Shutdown MacBook shell command is just:

shell_command:
  shutdown_macbook: !secret shell_shutdown_macbook

The command in secrets.yaml:

shell_shutdown_macbook: ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i /root/.ssh/id_rsa [email protected] 'sh /Users/alec/scripts/evening_shutdown.sh'

Thanks for your help!

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