[systemd-devel] Add ARCH parameter to /etc/os-release

[Lennart Poettering]

On Mon, 08.04.13 22:09, Askar Safin (safinaskar at mail.ru) wrote:

> 
> >I'm not sure what problem the proposal is trying to solve.  Maybe it'd
> >be clearer if that was provided.
> I want to know what is the arches of the systems on my computer. I. e. I want to do the following:
> 
> for DISK in /dev/sd*; do
>   mount "$DISK" /mnt
>   source /mnt/etc/os-release
>   echo "Arch of $DISK is $ARCH"
> done
> 
> And I want to use this $ARCH to do "setarch", i. e.:
>   mount /dev/some-dev /mnt
>   source /mnt/etc/os-release
>   setarch "$ARCH" chroot /mnt
> So, this /mnt system will see "uname -m" output which is meaningful for the system.

My suggestion would be to write a little tool that does the equivalent
to this:

readelf -h /usr/lib*/libdl*.so | grep Machine | cut -c38- | uniq

This will list you the architectures for which you have dynamic loaders
installed. Since the dynamic loaders are hardcoded in all dynamic ELF
binaries this list will tell you binaries of which archs you can execute
on your system.

Lennart

-- 
Lennart Poettering - Red Hat, Inc.