[Solved]How to install "<uapi/...>" directory?

nanxiao · 2017-07-27 10:05:06

Hi all,

I am trying to use ebpf in Arch Linux, and find many ebpf code include following directory:

#include <uapi/linux/ptrace.h>

But my /usr/include/uapi is empty. How to install uapi related stuff in Arch Linux?

Thanks very much in advance!

Best Regards
Nan Xiao

Last edited by nanxiao (2017-07-28 12:31:38)

WorMzy · 2017-07-27 10:21:15

You can use 'pacman -F' or pkgfile to identify what package (if any) provides a file or directory:

$ pkgfile -d /usr/include/uapi/
core/linux-api-headers

$ pacman -Fo /usr/include/uapi/
usr/include/uapi/ is owned by core/linux-api-headers 4.10.1-1

Note that you need to download the file databases first. Check the man pages for details.

Mod note: Moving to NC.

Trilby · 2017-07-27 11:10:25

Wormzy, he clearly has linux-api-headers already installed as he has that directory - but it is empty. The linux-api-headers package does not contain anything in that directory, just the empty directory.

However, nanxiao, this sounds a bit like an X-Y problem. Why do you think you need to include something from that directory? What are you trying to do?

WorMzy · 2017-07-27 11:15:30

Ah, my bad. I didn't realise that the directory was empty in the package.

nanxiao · 2017-07-27 13:52:12

@Trilby

> However, nanxiao, this sounds a bit like an X-Y problem. Why do you think you need to include something from that directory? What are you trying to do?

I am reading this script, and come across following include statement:

#include <uapi/linux/ptrace.h>

Per my understanding, it should be in `/usr/include` directory. Does my understand right?

Thanks very much in advance!

Trilby · 2017-07-27 14:27:28

No, that is in kernel-modules, so it's at /usr/lib/modules/$(uname -r)/build/include/uapi/linux/ptrace.h

But why does it matter where it is? I assume you are getting some sort of error - if you want help, tell us what you are trying to do and what error you are getting.

nanxiao · 2017-07-28 03:13:34

Hi Trilby,

It seems I get the answer: "/usr/include/uapi" is used for user-space programming. When I refer pidpersec.py:

# load BPF program
b = BPF(text="""
#include <uapi/linux/ptrace.h>
...
...)

It is actually compiled into a kernel module, so it should refer "/usr/lib/modules/$(uname -r)/build/include/..." directory to find related files.

Is my understanding right? Thanks very much in advance!

Trilby · 2017-07-28 11:40:45

nanxiao wrote:

It is actually compiled into a kernel module, so it should refer "/usr/lib/modules/$(uname -r)/build/include/..." directory to find related files.

Yes.

nanxiao · 2017-07-28 12:31:22

Hi Trilby,

Thanks very much for your confirmation!

Lone_Wolf · 2017-07-29 14:44:37

Nanxiao,

Are you aware that there is a BPF Compiler Collection - C library and examples package in AUR ?

nanxiao · 2017-07-31 00:46:43

@Lone_Wolf,

> Are you aware that there is a BPF Compiler Collection - C library and examples package in AUR ?

Yes, I know. I have installed it.

Arch Linux

#1 2017-07-27 10:05:06

[Solved]How to install "<uapi/...>" directory?

#2 2017-07-27 10:21:15

Re: [Solved]How to install "<uapi/...>" directory?

#3 2017-07-27 11:10:25

Re: [Solved]How to install "<uapi/...>" directory?

#4 2017-07-27 11:15:30

Re: [Solved]How to install "<uapi/...>" directory?

#5 2017-07-27 13:52:12

Re: [Solved]How to install "<uapi/...>" directory?

#6 2017-07-27 14:27:28

Re: [Solved]How to install "<uapi/...>" directory?

#7 2017-07-28 03:13:34

Re: [Solved]How to install "<uapi/...>" directory?

#8 2017-07-28 11:40:45

Re: [Solved]How to install "<uapi/...>" directory?

#9 2017-07-28 12:31:22

Re: [Solved]How to install "<uapi/...>" directory?

#10 2017-07-29 14:44:37

Re: [Solved]How to install "<uapi/...>" directory?

#11 2017-07-31 00:46:43

Re: [Solved]How to install "<uapi/...>" directory?

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