How can I get current localization of Linux through C? -

How can I get current localization of Linux through C? -

how can current localization (ru-ru, en-us, en-gb, e.t.c.) of linux through c?

thank you.

on posix-compliant system, setlocale(lc_ctype, null); homecoming name of locale selected category lc_ctype.

c linux locale