This is a simple c clone of the website hackertyper.net. The code can be found at github.com/Hurricane996/hackertyper. Here is a local copy

Makefile

PREFIX=/usr/local
BINDIR=$(PREFIX)/bin
DATAROOTDIR=$(PREFIX)/share
DATADIR=$(DATAROOTDIR)
MAN1DIR=$(DATAROOTDIR)/man/man1

CFLAGS=-Wall -pedantic -std=c99
LDFLAGS=-lncurses

all: hackertyper

.PHONY: all clean install

hackertyper: hackertyper.o
 cc -o $@ $^ $(LDFLAGS)
hackertyper.o: src/hackertyper.c
 cc -c $(CFLAGS) -o $@ $^
src/hackertyper.c: src/hackertyper.h
src/hackertyper.h:src/hackertyper.h.in
 sed "s@%datadir%@$(DATADIR)@g" src/hackertyper.h.in > src/hackertyper.h

clean:
 rm -f hackertyper,.o src/hackertyper.h

install:
 install -D -m644 data/hackertyper.txt $(DATADIR)/hackertyper.txt
 install -D -m644 man/hackertyper.1 $(MAN1DIR)/hackertyper.1
 install -D -m755 hackertyper $(BINDIR)/hackertyper

src/hackertyper.c

#include "hackertyper.h"

char* filename;
FILE* file;


char chars_per_nl = 1;

int main(int argc, char* argv[]) 
 parse_args(argc, argv);

 if(open_file(filename) == -1)

 return -1;
 

 init();

 int clear_msg_flag = 0;

 nc_color_green();

 int running = 1;

 while(running) 
 // buffer here so that buffering happens before clear_msg
 int input_ch = getch(); 
 // message was drawn last time and we need to clear it
 if(clear_msg_flag) 
 clear_msg_flag = 0;
 clear_msg();
 

 switch(input_ch)
 //C-c
 case 3:
 running = 0;
 break;
 //C-d
 case 4:
 clear();
 nc_color_red();
 draw_msg("ACCESS DENIED");
 clear_msg_flag = 1;
 break;
 // C-g
 case 7:
 clear();
 nc_color_green();
 draw_msg("ACCESS GRANTED");

 clear_msg_flag = 1;

 break;
 case KEY_BACKSPACE:
 backspace();
 break;
 default:
 for(int i = 0; i < 5; i++) 
 int output_ch = fgetc(file);

 if(output_ch == EOF) 
 rewind(file);

 output_ch = fgetc(file);
 

 if(output_ch != 'r')
 addch(output_ch);
 

 refresh();
 break;
 
 

 end();


void parse_args(int argc, char* argv[]) 
 if(argc > 1) 
 for(int i = 0; i < argc; i++) strcmp(argv[i], "--version") == 0) 
 printf(VERSION_TEXT);

 exit(0);
 

 if(strcmp(argv[i], "-f") == 0) 
 if(i+1 >= argc) 
 fprintf(stderr, HELP_TEXT);

 exit(-1);
 

 filename = argv[i+1];
 
 
 


int open_file(char* filename) 
 filename = filename ? filename : default_filename;
 file = fopen(filename, "r");

 return file == NULL ? -1 : 0;


void init()
 initscr();
 raw();
 noecho();
 scrollok(stdscr, true);
 keypad(stdscr, true);

 // check line endings
 // TODO: expand this to work with endings besides n and rn

 char ch;

 while(ch !='n' && ch !='r')
 ch = fgetc(file);
 

 if (ch == 'r') 
 chars_per_nl = 2;
 

 rewind(file); 

 if(has_colors())
 start_color();
 init_pair(1, COLOR_GREEN, COLOR_BLACK);
 init_pair(2, COLOR_RED, COLOR_BLACK);
 


void nc_color_green()
 if(has_colors())
 attroff(COLOR_PAIR(2));
 attron(COLOR_PAIR(1));
 


void nc_color_red()
 if(has_colors())
 attroff(COLOR_PAIR(1));
 attron(COLOR_PAIR(2));
 


void nc_color_default()
 if(has_colors())
 attroff(COLOR_PAIR(1));
 attroff(COLOR_PAIR(2));
 


void backspace()
 fseek(file,-1 ,SEEK_CUR);

 int x,y;
 getyx(stdscr,y,x);

 if(x == 0) 

 if( y == 0 ) 

 return;
 

 x = getmaxx(stdscr);
 // set x to x minus 1
 move(--y,--x);

 char ch = ' ';

 while(ch == ' ' && x != 0)
 move(y,--x);
 ch=inch();
 

 fseek(file, -chars_per_nl, SEEK_CUR);
 else 
 move(y,x-1);

 


 delch();


// TODO: fix this shit
void draw_msg(char* msg) 
 int len = strlen(msg);
 unsigned char hash = '#';
 unsigned char space = ' ';

 int w;
 int h;

 getmaxyx(stdscr, h, w);

 move(h/2 - 2, w/2 - len/2 - 3);

 for(int i = 0; i < len + 6; i ++)
 addch(hash);

 move(h/2 - 1, w/2 - len/2 - 3);

 addch(hash);

 for(int i = 0; i < len + 4; i ++)
 addch(space);

 addch(hash);

 move(h/2, w/2 - len/2 - 3);
 printw("# %s #", msg);

 move(h/2 + 1, w/2 - len/2 - 3);
 addch(hash);

 for(int i = 0; i < len + 4; i ++)
 addch(space);

 addch(hash);

 move(h/2 + 2, w/2 - len/2 - 3);

 for(int i = 0; i < len + 6; i ++)
 addch(hash);


void clear_msg()
 nc_color_green();
 clear();
 move(0, 0);
 // seek file to next line
 int ch = 0;

 while(ch != 'n')
 ch = fgetc(file);
 


void end()
 endwin();
 fclose(file);

src/hackertyper.h.in

#include <stdio.h>
#include <stdlib.h>
#include <ncurses.h>
#include <string.h>

#define default_filename "%datadir%/hackertyper.txt"

#define HELP_TEXT "
Usage: hackertyper [-f file] [-h] [-v]n
Print text from file to stdout on pressing keys, similar to behavior of website https://www.hackertyper.org/n
n
Options:n
 -f FILE, --filename FILE Print text from FILE rather than from default filen
 -h, --help Print this help stringn
 -v, --version Print version informationn
"

#define VERSION_TEXT "
hackertyper 2.1n
Copyright (C) 2019 Lani Willrichn
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>n
This is free software: you are free to change and redistribute it.n
There is NO WARRANTY, to the extent permitted by law.n
Written by Lani Willrichn
"

void parse_args(int argc,char* argv[]);

int open_file(char* filename);

void init();
void nc_color_red();
void nc_color_green();
void nc_color_default();

void backspace();

void draw_msg(char* msg);
void clear_msg();

void end();

Some irrelevant files have not been listed including an auto-generated manapge and the data files