Re: [PATCH 0/2] selftests/nolibc: small simplification of test development phase

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On Tue, Jan 24, 2023 at 12:31:01AM +0700, Ammar Faizi wrote:
> I figured it out. It turned qemu-user is a different package.
> So I have "qemu-system" installed, but not "qemu-user".
> 
> Without building from source, just do this on Ubuntu:
> 
>   $ sudo apt-get install qemu-user -y
>   ...
>   Preparing to unpack .../qemu-user_1%3a6.2+dfsg-2ubuntu6.6_amd64.deb ...
>   Unpacking qemu-user (1:6.2+dfsg-2ubuntu6.6) ...
>   Selecting previously unselected package qemu-user-binfmt.
>   Preparing to unpack .../qemu-user-binfmt_1%3a6.2+dfsg-2ubuntu6.6_amd64.deb ...
>   Unpacking qemu-user-binfmt (1:6.2+dfsg-2ubuntu6.6) ...
>   Setting up qemu-user (1:6.2+dfsg-2ubuntu6.6) ...
>   Setting up qemu-user-binfmt (1:6.2+dfsg-2ubuntu6.6) ...
>   Processing triggers for man-db (2.10.2-1) ...
> 
>   $ which qemu-x86_64
>   /usr/bin/qemu-x86_64

Ah cool! I looked for something like this on a remote ubuntu system but
failed to figure it out by myself. Do you also have the other archs with
it ?

>   $ sudo make run-user
>   MKDIR   sysroot/x86/include
>   make[1]: Entering directory '/home/ammarfaizi2/work/linux.work.cc/tools/include/nolibc'
>   make[2]: Entering directory '/home/ammarfaizi2/work/linux.work.cc'
>   make[2]: Leaving directory '/home/ammarfaizi2/work/linux.work.cc'
>   make[2]: Entering directory '/home/ammarfaizi2/work/linux.work.cc'
>     INSTALL /home/ammarfaizi2/work/linux.work.cc/tools/testing/selftests/nolibc/sysroot/sysroot/include
>   make[2]: Leaving directory '/home/ammarfaizi2/work/linux.work.cc'
>   make[1]: Leaving directory '/home/ammarfaizi2/work/linux.work.cc/tools/include/nolibc'
>     CC      nolibc-test
>   83 test(s) passed.

Great. And without sudo you should see two of them fail. I intend to
implement geteuid() and condition their result to it, that will be
sufficient for most cases. I'd rather avoid seeing users run test
programs under sudo actually, since they're run on the local system :-/

> Sorry for that. I didn't know that they come from different packages.
> It works fine for me now.

No, don't be sorry, quite the opposite, you taught us something useful!

Thank you!
Willy



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