set-file-name-coding-system

set-file-name-coding-system is an interactive compiled Lisp function in `mule.el'.

It is bound to C-x RET F, <menu-bar> <options> <mule> <set-various-coding-system> <set-file-name-coding-system>.

(set-file-name-coding-system CODING-SYSTEM)

Set coding system for decoding and encoding file names to CODING-SYSTEM.
It actually just set the variable `file-name-coding-system' (which see)
to CODING-SYSTEM.