#include <stdio.h> #include <termios.h> #include <unistd.h> #include <stdbool.h>

struct termios shell_in_tioctl; bool f_have_shell_tioctl = false;

bool capture_shell_tioctl() { if (f_have_shell_tioctl) return true;

// 1. Flush all standard C streams to ensure TTY synchronization fflush(NULL);

// 2. Safely capture the pristine shell state if (tcgetattr(STDIN_FILENO, &shell_in_tioctl) == 0) { f_have_shell_tioctl = true; return true; } return false; }