In order to print manual by text printer I wrote this program
This program can not eliminate kernel mode

#include <stdio.h>
int main(void){
        int c;
        while((c=getchar()) != EOF){
                if(c=='\033'){
                        getchar();
                        getchar();
                        getchar();
                }
                else{
                        putchar(c);
                }
        }
}