Dietpi: Chromium Kiosk - Permission Denied

[lasers]

Creating a bug report/issue

Required Information

#!/bin/bash
G_DIETPI_VERSION_CORE=6
G_DIETPI_VERSION_SUB=28
G_DIETPI_VERSION_RC=0
G_GITBRANCH='master'
G_GITOWNER='MichaIng'

• buster 10.2
• Linux dietpi-leaf 4.19.75-v7l+ #1270 SMP Tue Sep 24 18:51:41 BST 2019 armv7l GNU/Linux
• RPi 4 Model B (armv7l)
• Raspberry Pi 15.3W USB-C Power Supply
• SanDisk ultra

Steps to reproduce

1. Install chromium kiosk on fresh install.
2. Use user dietpi.

Expected behaviour

• Start chromium kiosk.

Actual behaviour

• Received /var/lib/dietpi/dietpi-software/installed/chromium-autostart.sh Permission denied on the screen.

[Joulinar]

Hi,
pls try to run chromium as user root within the autostart option

[lasers]

This works fine. Thanks. I'm filing a bug because it doesn't work out of box with non-root. Also, chromium-browser takes up some of the screen similar to https://github.com/MichaIng/DietPi/issues/2306. I'm just trying things right now.

[Joulinar]

hi, you would need to adjust Chromium resolution settings as follow nano /DietPi/dietpi.txt. Close to the bottom of the file you will find the following.

# Chromium options
SOFTWARE_CHROMIUM_RES_X=1280
SOFTWARE_CHROMIUM_RES_Y=720
SOFTWARE_CHROMIUM_AUTOSTART_URL=https://dietpi.com

[lasers]

Ah I see. That's it. Thank you very much. :blush: I'll opt for minimal WM instead. I'll leave this issue open since I'm not sure if it's an issue that chromium-browser must be used with user root. Cheers.

[Joulinar]

you can fix the access to the file. that's not the problem, but you will create new issues like Cannot open /dev/tty0 (Permission denied)

[MichaIng]

@lasers
Many thanks for your report. Indeed the option to choose autologin user is relatively new and we did not yet auto-apply to required permissions to start certian applications, as also noted in dietpi-autostart GUI, AFAIK.

I'll check the required permissions for Chromium kiosk mode + GPU acceleration and implement/post here. Until then, choosing root will work.

[theiconrichie]

I have root set, and i get no such file found. doesnt work for me and the pi zero is so slow it cant run chromium on a X desktop at all.

[Joulinar]

@theiconrichie
pls can you past ls -l /var/lib/dietpi/dietpi-software/installed/

[promofu]

I just had a similar issue and looked for file permissions along the path and
found that /var/lib/dietpi allthough being a directory was set to 660 instead of at least 770.

Maybe that helps ?

[MichaIng]

@promofu
Many thanks for reporting.
You're right, we assign this wrong during image creation 😓: https://github.com/MichaIng/DietPi/commit/8f28f231cbbbae7659005020dbf20d9cb86cdd38
I'll add this to v6.29 patch + MOTD live patch until then.

[MichaIng]

Fixed: https://github.com/MichaIng/DietPi/commit/d6cfa300305b356d1f5e4bc9c4da582771153b15
MOTD hack:

# - https://github.com/MichaIng/DietPi/issues/3322
[[ $UID == 0 ]] && chmod -f +x $(find /var/lib/dietpi -type d) /var/lib/dietpi/services/*sh /var/lib/dietpi/dietpi-software/installed/*sh

Changelog: https://github.com/MichaIng/DietPi/commit/363533b003fa9a6789204c9e621d0f571b1e3e84