UEvent | Userland Events in PHP

I have AKS cluster deployed(version 1.19) on Azure, part of the deployment in kube-system namespace there are 2 azure-cni-networkmonitor pods, when opening a bash in one of the pods using:

There is an embedded system, and it provides functions in a struct of platform_driver:

Yesterday we lost contact with 10 identically configured servers, after some investigation the conclusion was that a reboot after security updates had failed.

We have so far not been able to get any of the servers back online, but were lucky enough to be able to reinstall the instances without data loss.

I will paste the console log below, can anyone help me determine the root cause and perhaps give me some advice on if there is a better way to configure the server to make recovery easier (like getting past the "Press Enter to continue." prompt, that it seems to hang in).

The full log is too big for SO, so I put it on pastebin and pasted a redacted version below. I have removed the escape sequences that colorize the output and removed some double new lines, but besides that it is complete.

I have written battery driver and that driver sends an uevent when a power supply is changed, i.e. from AC to battery

When I run udevadm monitor I see an KERNEL and UDEV CHANGE events from power_supply subsystem upon removing AC supply.

My requirement is to notify the user application when there is an CHANGE event from power_supply subsystem. I do not want to poll for kernel message or netlink socket from user application.

Is it possible for me to register/listen for this particular uevent from user application and gets something like callback function when an event occurs?

I set my tslib config as below:

I would like to use uniq to count the number of occurrences of each line, excluding the numerical value at the beginning of the line (example: 0000:01:00.0)

Each occurrence occurs more than once. There may be situations where each occurrence only occurs once.

Sample Input

1. I have a hardware dev kit on my desk attached to my Windows laptop via USB. The dev kit allows you to flash a chip via USB. I would like to expose this device to my server environment using usbip.

2. On my Windows PC I run a virtualbox with USBIP server. I have bound the hw dev kit. The server is listening on port 3240 which is forwarded by Virtual Box to the host (laptop) port 7023

3. Using SSH I login into my server. I have setup an SSH remote tunnel so that port 3240 on the server will sent requests to port 7023 on the laptop.

Summary

USBIP server port 3240 --Virtual Box--> laptop port 7023 <--SSH -R :3240:localhost:7023

On the server this is working:

I'm currently developing an input subsystem driver for touchscreen. What I don't know is how to access the device from userspace, e.g. how to open a file that should be created in filesystem. What I've done so far is this: After I insmod the driver, I get the following message in dmesg:

input: driver_name as /devices/platform/soc/3f804000.i2c/i2c-1/1-0038/input/input0

Now when I go at this location, I find input0, which is a directory. In this directory, I can find files such as name, properties, uevent, but none of the files here contains touch data.

My question here is, where does input subsystem puts touch data after I call

I'm running in to what appears to be a bit of an odd one.

Base machine is Ubuntu 18.04. I'm experimenting with creating a custom initramfs + init script to use with custom compiled kernels that are being used with qemu instances.

From the directory I'm using as the base for the initramfs: