RockOS/programs/vga_text_term/main.c

#include <unistd.h>

void term();

int ptys;
int ptym;

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

    ptym = pty(&ptys);

    if (fork() == 0) {
        close(ptym);
        dup2(ptys, 0);
        dup2(0, 1);
        dup2(0, 2);

        exec("/bin/rocksh.elf");  
    }

    close(ptys);
    dup2(ptym, 0);
    dup2(0, 1);
    dup2(0, 2);

    term();

    return 0;
}

void term() {
    int vga_fd = open("/dev/tvga");
    if (vga_fd == -1) return;

    while (1) {
        char c;
        int rd = read(0, &c, 1);
        if (rd > 0) {
            write(vga_fd, &c, 1);
        }
    }
}