python script not executed automatically

    I installed libreelec using image

    Thesystem boots automatically into KODI.

    if i login over ssh with MobaXterm 20.6 i see:

    LibreELEC (official): 9.2.6 (RPi4.arm)

    LibreELEC:~ #

    So I would like to control my ambilight at the same time via hyperion.ng

    In order to shutdown the Raspi automatically when switching off power

    I use the hardware extension "StromPi3".

    Therefore a python script ("powershutdown_serialless.py)must be

    executed when starting up the Raspi.

    In the forum I found the post by "jakob" from June 13, 2020 and then made all

    the settings :

    - install "Raspberry Pi Tools" add-on

    - create the folder /storage/.kodi/userdata/scripts

    - insert lines in my powershutdown_serialless.py

    import sys

    sys.path.append('/storage/.kodi/addons/virtual.rpi-tools/lib')

    - put powershutdown_serialless.py into /storage/.kodi/userdata/scripts

    - create /storage/.config/autostart.sh

    both files attached in the datei.zip.

    When i start the powershutdown_serialless.py from an ssh terminal see hier :

    LibreELEC (official): 9.2.6 (RPi4.arm)

    LibreELEC:~ #

    LibreELEC:~ # python /storage/.kodi/userdata/scripts/powershutdown_serialless.py &

    LibreELEC:~ # Safe Shutdown in the case of Powerfailure (CTRL-C for exit)

    it works fine. But on booting the raspi the script "powershutdown_serialless.py"

    is not executed.

    Where is the mistake ?

    many thanks for the support

    Check your autostart.sh script if you just created it for any errors DOS format and not UNIX?

    this should start your script like on startup..

    Code
    sh /storage/.config/autostart.sh

    run this on autostart.sh

    Code
    dos2unix /storage/.config/autostart.sh

chmod 777 /storage/.config/autostart.sh

    the autostart.sh in your zip file is in windows dos...needs to be unix format..but might have changed by uploading or downloading or whatever..not sure...try those 2 commands and you should be good to go..

    the problem was definitely autostart.sh

    I logged in with a terminal program (mobaxterm) and the /storage/.config/autostart.sh file was just one line
    python /storage/.kodi/userdata/scripts/powershutdown_serialless.py &

    created and the rights set with chmod.
    the command is now executed correctly. after entering ps -ef i can also see the running process. 566 root 0:00 python /storage/.kodi/userdata/scripts/powershutdown_serialless.py

    it would be nice if a message could be sent to all logged-in terminals in the event of a power failure - is that possible?

    the print commands from the powershutdown_serialless.py script do not arrive on a logged-in terminal

    Many Thanks

    Edited once, last by aldebaranhg (February 11, 2021 at 2:59 PM).

    try before line 50 in your script add

    Code
    os.system("echo "Raspberry Pi Shutdown!" >/dev/pts/1")

    that is for 1 open terminal


    if you have more then

    to find all open terminals

    Code
    find /dev/pts

    then you can edit your script ex

    Code
    os.system("echo "Raspberry Pi Shutdown!" >/dev/pts/1")
os.system("echo "Raspberry Pi Shutdown!" >/dev/pts/2")
os.system("echo "Raspberry Pi Shutdown!" >/dev/pts/3")

    etc


    that should send a message to all terminals

    "Raspberry Pi Shutdown!"

    Edited 3 times, last by Mario77 (February 11, 2021 at 7:42 PM).

    thank you for your prompt reply
    Unfortunately I don't get any output on my terminal (MobaXterm via ssh)
    when I insert the new line:
    if x> = ShutdownTimer:

    print ("Raspberry Pi Shutdown!")

    os.system ("echo" Raspberry Pi Shutdown! "> / dev / pts / 1")

    time.sleep (5)

    os.system ("shutdown -h now")

    the modified script is no longer executed - no display of 687 root 0:00 python /storage/.kodi/userdata/scripts/powershutdown_serialless.py
    more about the processes at ps -ef

    I also tried to add a waiting time so that the message could be read, but it didn't work either.

    Edited once, last by aldebaranhg: another test (February 11, 2021 at 8:44 PM).

    additive
    sh /storage/.config/autostart.sh results in:
    LibreELEC: ~ # sh /storage/.config/autostart.sh
    LibreELEC: ~ # File "/storage/.kodi/userdata/scripts/powershutdown_serialless.py", line 51 os.system ("echo" Raspberry Pi Shutdown! "> / dev / pts / 1") ^
    SyntaxError: invalid syntax

    Quote from aldebaranhg

    additive
    sh /storage/.config/autostart.sh results in:
    LibreELEC: ~ # sh /storage/.config/autostart.sh
    LibreELEC: ~ # File "/storage/.kodi/userdata/scripts/powershutdown_serialless.py", line 51 os.system ("echo" Raspberry Pi Shutdown! "> / dev / pts / 1") ^
    SyntaxError: invalid syntax

    Code
    os.system("echo "Raspberry Pi Shutdown!" >/dev/pts/1")

    try copy and paste this exactly..

    below is yours...you moved few bits:

    Code
    os.system ("echo" Raspberry Pi Shutdown! "> / dev / pts / 1")

    It worked here...no reason it doesn't work for you...you can open more terminal windows to test from one to the other and you ll see the message popping up..

    I m not great with python hence i gave you the shell version of the command..you r basically sending an sh command from a py script..

    I m not sure what your script is for but if it's something important you can even send an automated email from libreelec to your email..

    i copied the code exactly. Maybe some characters (space) got into it through later editing (google translater).
    Sorry, I still have to learn how to correctly compose my posts!
    I think the python interpreter cannot recognize the expression os.system..... The normal shellcommando

    LibreELEC: ~ # os.system ("echo" Raspberry Pi Shutdown! "> / Dev / pts / 0")
    sh: syntax error: unexpected word (expecting ")") does not work under Libreelec either.

    with LibreELEC: ~ / .config # echo "3456"> / dev / pts / 0
    3456
    can I send texts between logged-in terminals.

    to your question:
    the script powershutdown_serialless shuts down the raspi at power off. That works fine. I can also do without the additional issue of a message.

    when I start the script manually:
    LibreELEC: ~ / .kodi / userdata / scripts # python powershutdown_serialless.py &
    LibreELEC: ~ / .kodi / userdata / scripts # Safe Shutdown in the case of Powerfailure (CTRL-C for exit)
    Here you can also see that the script is working properly:
    messages are issued.
    Case 1 momentary power failure
    LibreELEC: ~ / .config #
    LibreELEC: ~ / .config # Raspberry Pi Powerfail detected
    Raspberry Pi Power Back Detected!

    Case 2 long failure power
    LibreELEC: ~ / .config #
    LibreELEC: ~ / .config # Raspberry Pi Powerfail detected
    Raspberry Pi Shutdown!

    The main thing is that the script is started automatically and works properly.
    Thanks again :)