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#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include "Globals.h"
#include "Terminal.h"
static struct termios orig_term;
int tty_fd = -1;
int tty_out_fd = -1;
int orig_stdout = -1;
int stdin_is_tty = 0;
void restore_terminal(void) {
if (tty_fd >= 0) {
tcsetattr(tty_fd, TCSAFLUSH, &orig_term);
}
int restore_fd = tty_out_fd >= 0 ? tty_out_fd : STDOUT_FILENO;
dprintf(restore_fd, "\033[?1049l\033[2J\033[?25h\033[0m");
if (tty_fd >= 0) {
close(tty_fd);
}
if (tty_out_fd >= 0 && tty_out_fd != STDOUT_FILENO) {
close(tty_out_fd);
}
if (orig_stdout >= 0 && orig_stdout != STDOUT_FILENO) {
close(orig_stdout);
}
}
static void handle_signal(int sig) {
restore_terminal();
_exit(128 + sig);
}
void setup_terminal(void) {
signal(SIGINT, handle_signal);
signal(SIGTERM, handle_signal);
if (isatty(STDOUT_FILENO)) {
tty_out_fd = STDOUT_FILENO;
} else {
tty_out_fd = open("/dev/tty", O_WRONLY);
if (tty_out_fd < 0) {
fprintf(stderr, "Error: cannot open terminal for output\n");
exit(1);
}
}
tty_fd = open("/dev/tty", O_RDWR);
if (tty_fd < 0) {
tty_fd = dup(STDIN_FILENO);
}
if (tty_fd < 0) {
dprintf(tty_out_fd, "\033[?1049l\033[2J\033[?25h");
close(tty_out_fd);
fprintf(stderr, "Error: cannot open terminal for keyboard input\n");
exit(1);
}
struct termios t;
tcgetattr(tty_fd, &orig_term);
atexit(restore_terminal);
tcgetattr(tty_fd, &t);
t.c_lflag &= ~(ICANON | ECHO);
tcsetattr(tty_fd, TCSAFLUSH, &t);
dprintf(tty_out_fd, "\033[?1049l\033[2J\033[?25l");
}
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