Remote debugging error on raspberry "can't open /dev/mem: Permission denied" (sudo..)

K-Str

Hello to all,
in the past I got very good support here. Thanks!
Now I have a problem running a application.
can't open /dev/mem: Permission denied
I think there is only a little missing.
How can I run an application as root (sudo ...)?
This is my configuration:
Qt Creator 4.5.0
Based on Qt 5.10.0 (GCC 5.3.1 20160406 (Red Hat 5.3.1-6), 64 bit)
Built on Dec 4 2017 04:11:21

J.Hilk

Hi @K-Str
I‘m not to familiar with Linux, but this problem I remember.

The issue is, that QtCreator, that you use for debugging?, needs to run with sudo right, because the creator starts the debugger and inherits the permissions of QtCreator.

jsulm

@K-Str said in Remote debugging error on raspberry "can't open /dev/mem: Permission denied" (sudo..):

How can I run an application as root (sudo ...)?

sudo qtcreator

JonB

@K-Str
If @jsulm's sudo qtcreator works for you, great.

However, although I've never done remote debugging or RPi anything, I would have thought since your post is entitled Remote debugging that your problem & error message come from the remote/server side, not the local/client side of the debugging process? In which case you need to address your permission problem where it's happening on the RPi, not on the client side...?

K-Str

@jsulm ,
thanks for your answer, but the problem is on the Raspberry.
When I run sudo qtcreator it still makes the same problem because its not allowed to run the application on the raspberry. The access to /dev/mem needs root privileges.

JonB

@K-Str
Which is exactly what I just wrote earlier.
Hence you should be looking at your gdbserver permissions on the RPi, no?

K-Str

@JonB ,
I checked it .
This are the permissions of gdbserver:
-rwxr-xr-x 1 root root 235168 Okt 27 2016 /usr/bin/gdbserver
Is there any way to execute the application like
sudo applname
and how can I setup this in QT-Creater on the UBUNTU host??

K-Str

Hi,
I solved this.
When I login on the device as user root then it works,