usage_func_t
static usage_func_t usage;
static usage_func_t usage;
void usage_func_init(usage_func_t *, usage_cb_t);
int register_usage(usage_func_t *);
static usage_func_t usage;
usage_func_t *usage_f;
usage_func_init(usage_func_t *f, usage_cb_t func)
register_usage(usage_func_t *f)
static usage_func_t usage;
static usage_func_t usage;
static usage_func_t usage;
static usage_func_t usage;
static usage_func_t usage;