Not working with redroid

[XiaoliChan]

ENV:

• ecapture: 0.7.0
• devices: redroid 13 (docker container)

Error:
2023/12/16 17:30:14 Failed to read kernel configuration., error:open /proc/config.gz: no such file or directory

Redroid didn't include /proc/config.gz, maybe can add some argument like --force to force execute ecapture?

[cfc4n]

Good suggestion, I will evaluate it.

[XiaoliChan]

Can confirm /sys/kernel/btf/vmlinux is existed in redroid

[cfc4n]

Not all androids will have /sys/kernel/btf/vmlinux present. I intend to be compatible with both cases.

[XiaoliChan]

Not all androids will have /sys/kernel/btf/vmlinux present. I intend to be compatible with both cases.

Sweet, I'm looking forward to using it with redroid👍

[cfc4n]

Can you check where the '/proc/config.gz' file has been changed on your Redroid device?

[XiaoliChan]

Can you check where the '/proc/config.gz' file has been changed on your Redroid device?

I have tried many times with the Redroid (with Android 12-13), but it looks like /proc/config.gz has been removed and I can't find where it is.

So, I think maybe Redroid has done something like cleaning when building the image.

Reference:

• https://github.com/remote-android/redroid-doc

[XiaoliChan]

Okay, I know what happens now, so the IsContainer function in bpf_androidgki.go is not done yet

Force return true in IsContainer function to make it work

[cfc4n]

The IsContainer function does not return true directly, and some features need to be detected. What are the characteristics of Redroid that are different from Android? Like a file? A configuration?

[XiaoliChan]

What are the characteristics of Redroid that are different from Android? Like a file? A configuration?

TBH, I also don't know what the difference between them XD.
The reason why I use Redroid is it just a docker container and it is easy to deploy it. One thing I can confirm is ecapture can work properly on redroid.

[cfc4n]

Well, it looks like a niche need. I'm not going to fix it to the project, what do you think?

[XiaoliChan]

Well, it looks like a niche need. I'm not going to fix it to the project, what do you think?

Well, maybe need a --force arg and don't need to fix the IsContainer function

[cfc4n]

@hongyang51 在你的开发板设备上， config的路径是什么呢？