Re: How do I determine the ABI string used by pkg?

On 2023-03-07 9:09, Dan Langille wrote:
> Baptiste Daroussin wrote on 3/6/23 2:56 AM:
>> On Wed, Mar 01, 2023 at 11:50:13PM -0800, Mel Pilgrim wrote:
>>> I need to determine the ABI string pkg uses on a given system, and need to
>>> do so when there are no pkgs installed.
>> pkg config ABI
>> pkg config ALTABI
> 
> When run in a freshly-created jail:
> 
> [r730-01 dvl ~] % sudo jexec empty_tester
> root@:/ # pkg config ABI
> FreeBSD:13:amd64
> root@:/ # pkg config ALTABI
> freebsd:13:x86:64
> root@:/ #
> 
> Mel: I think this is what you wanted to get?

Your freshly-created jail has pkg installed.  `pkg config ABI` only 
works if pkg has been bootstrapped.

Getting the ABI string with just the /usr/sbin/pkg stub available is 
another thing entirely, even though that stub program necessarily has 
the code to determine the ABI string.  I ended up writing a small 
program that replicates the ELF-divining logic in pkg and prints the 
value of ABI.

IMO the stub should have the `pkg config ABI` functionality added to it, 
but I'm probably alone in thinking that would be useful.