[SOLVED] Systemd and running program Qt

[francknos]

Hi everyone,

I'm starting with RPI board.

I want run my GUI program make with Qt call "PM" automaticaly when user is login.

I have make a script like this =>

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#!/bin/bash
mkdir plop
cd plop
date > date.txt

/home/pi/Bureau/PM

I precise that if I write "...Bureau $: ./PM"

My program start correctlly.

Now I try to use systemd to run my program but it doesn't work i think the problem come from systemd.

Here is my service "MyServcie.service" :

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[Unit]
Description:Try to launch Prog Qt
After=graphical.target

[Service]
Type=simple
User=pi
WorkingDirectory=/home/pi/Bureau
ExecStart=/home/pi/Bureau/script

[Install]
WantedBy=graphical.target

The service call the script and the script normally run programm but not .

When I write :
sudo systemctl start MyService.service

The program has not started but I have a folder plop whith date in file so the service has started but not launch my program I don't huserstand why.

Someone can help me thanks.

Franck

[RaTTuS]

sudo systemctl status MyService.service

[francknos]

Here is the output of
sudo systemctl MyService status

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● xfservice.service - Try to launch simple script
   Loaded: loaded (/lib/systemd/system/xfservice.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Wed 2017-11-15 16:04:21 CET; 1s ago
  Process: 5494 ExecStart=/home/pi/Bureau/xfscript & (code=exited, status=0/SUCCESS)
 Main PID: 5494 (code=exited, status=0/SUCCESS)

nov. 15 16:04:20 CM3L systemd[1]: Started Try to launch simple script.
nov. 15 16:04:20 CM3L xfscript[5494]: bonjour ceci est un script lancé automatiquement
nov. 15 16:04:20 CM3L xfscript[5494]: mkdir: impossible de créer le répertoire « ploppppppppppppppppppppppppppppp »: Le fichier existe
nov. 15 16:04:21 CM3L xfscript[5494]: QXcbConnection: Could not connect to display

Here journalctl -xe

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-- L'unité (unit) xfservice.service a terminé son démarrage, avec le résultat done.
nov. 15 16:03:56 CM3L sudo[5450]: pam_unix(sudo:session): session closed for user root
nov. 15 16:03:56 CM3L xfscript[5456]: bonjour ceci est un script lancé automatiquement
nov. 15 16:03:56 CM3L xfscript[5456]: mkdir: impossible de créer le répertoire « ploppppppppppppppppppppppppppppp »: Le fichier existe
nov. 15 16:03:56 CM3L xfscript[5456]: /home/pi/Bureau/xfscript: ligne 10 : .: /home/pi/Bureau/ProbesManager : ne peut exécuter le fichier binaire
nov. 15 16:03:56 CM3L xfscript[5456]: le programme a t il été lancé ?
nov. 15 16:03:56 CM3L sudo[5463]:       pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/systemctl status xfservice.service
nov. 15 16:03:56 CM3L sudo[5463]: pam_unix(sudo:session): session opened for user root by (uid=0)
nov. 15 16:03:57 CM3L sudo[5463]: pam_unix(sudo:session): session closed for user root
nov. 15 16:04:17 CM3L sudo[5479]:       pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/systemctl status xfservice.service
nov. 15 16:04:17 CM3L sudo[5479]: pam_unix(sudo:session): session opened for user root by (uid=0)
nov. 15 16:04:17 CM3L sudo[5479]: pam_unix(sudo:session): session closed for user root
nov. 15 16:04:20 CM3L sudo[5488]:       pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/systemctl start xfservice.service
nov. 15 16:04:20 CM3L sudo[5488]: pam_unix(sudo:session): session opened for user root by (uid=0)
nov. 15 16:04:20 CM3L systemd[1]: Started Try to launch simple script.
-- Subject: L'unité (unit) xfservice.service a terminé son démarrage
-- Defined-By: systemd
-- Support: https://www.debian.org/support
-- 
-- L'unité (unit) xfservice.service a terminé son démarrage, avec le résultat done.
nov. 15 16:04:20 CM3L sudo[5488]: pam_unix(sudo:session): session closed for user root
nov. 15 16:04:20 CM3L xfscript[5494]: bonjour ceci est un script lancé automatiquement
nov. 15 16:04:20 CM3L xfscript[5494]: mkdir: impossible de créer le répertoire « ploppppppppppppppppppppppppppppp »: Le fichier existe
nov. 15 16:04:21 CM3L xfscript[5494]: QXcbConnection: Could not connect to display
nov. 15 16:04:21 CM3L xfscript[5494]: Aborted
nov. 15 16:04:21 CM3L xfscript[5494]: le programme a t il été lancé ?
nov. 15 16:04:22 CM3L sudo[5502]:       pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/systemctl status xfservice.service
nov. 15 16:04:22 CM3L sudo[5502]: pam_unix(sudo:session): session opened for user root by (uid=0)
nov. 15 16:04:22 CM3L sudo[5502]: pam_unix(sudo:session): session closed for user root

I have change #!/bin/bash to #!/bin/sh

because /home/pi/Bureau/PM unknow with bash

I think the error is nov. 15 16:04:21 CM3L xfscript[5494]: QXcbConnection: Could not connect to display

But Why I can start my program with execution the script ?

[RaTTuS]

QXcbConnection: Could not connect to display

you need some extra environment bits...
export DISPLAY=0.0
maybe ....? does x need to be up before this is able to work ?

[francknos]

export DISPLAY=0.0

Change nothing.

But my Qt program to run is a simple Application test just a windows.

I don't know why I have error on QXcbConnection: Could not connect to display

[RaTTuS]

umm
I'm clutching at straws here but

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nov. 15 16:04:22 CM3L sudo[5502]:       pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/bin/systemctl status xfservice.service

seems to suggest user root and not pi

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[Unit]
Description:Try to launch Prog Qt
After=graphical.target

looks good....

I've not used QT so ...
I'll have a think but if anyone else has a clue ?

[ShiftPlusOne]

AIUI, systemd services aren't for starting GUI applications.

Is the idea that this runs automatically when the user logs in, or are you expecting a dedicated X11 session with just this application and nothing else?

[francknos]

What I am trying to do is simply launch my program when the desktop is displayed.

like opening the LXTerminal.


What does mean "I'm clutching at straws here but"

[ShiftPlusOne]

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# Make an autostart directory for the current user:
mkdir -p ~/.config/autostart
# Create a .desktop file which runs your script:
cat > ~/.config/autostart/bureau.desktop << EOF
[Desktop Entry] 
Type=Application
Exec=/home/pi/Bureau/script
EOF

https://wiki.lxde.org/en/Autostart

[francknos]

THANKS !!! ShiftPlusOne

It works !!!

So If I have a non GUI application hostapd willl work ?

[ShiftPlusOne]

THANKS !!! ShiftPlusOne

It works !!!

You're welcome.

So If I have a non GUI application hostapd willl work ?

I think there is some context missing in the question.

[scruss]

What does mean "I'm clutching at straws here but"

It means that user RaTTuS was making a guess that they didn't quite believe would work.

Glad you've got this sorted out. Autostart is good.

You can also run user systemd services: create your service file in ~/.config/systemd/user/ then

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systemctl --user enable name_of_my.service