Shell pkg ${ABI} variable

holala · Dec 29, 2019

Hello.

I'm curious how pkg determines ABI (if undefined). man 7 pkg states that

Default ABI is determined from /bin/sh

May you explain how exactly strings such as "freebsd:10:x86:64" are generated?

Thanks.

Kiiski · Dec 30, 2019

Hi

If I understood your question correctly, you can check source code from here:

pkg source code on GitHub

holala · Dec 30, 2019

I thought it is something easier, but it uses libelf and other stuff unfamiliar to me. In pkg_elf.c the function pkg_get_myarch_elfparse(...)

C:

snprintf(dest, sz, "%s:%s", ei.osname, ei.strversion);

C:

default:
        snprintf(dest + strlen(dest), sz - strlen(dest), ":%s:%s",
            arch, wordsize_corres_str);
        break;

It is interesting that the mentioned string contains additional data for the different architectures.