pub unsafe extern "C" fn mnt_context_set_passwd_cb(
cxt: *mut libmnt_context,
get: Option<unsafe extern "C" fn(arg1: *mut libmnt_context) -> *mut c_char>,
release: Option<unsafe extern "C" fn(arg1: *mut libmnt_context, arg2: *mut c_char)>,
) -> c_int