ref: 5bb11ec674b1d8ea7693a5f9120280f1102c5796
dir: /cmd/rc.h/
#pragma once
void rc_main(void);
int echo_main(int, char**);
int clear_main(int, char**);
int check_main(int, char**);
int cal_main(int, char**);
static prog_t cmdtbl[] =
{
{"echo", echo_main},
{"clear", clear_main},
{"check", check_main},
{"cal", cal_main},
};