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Disable TTY input when using udev. 

Avoids possible commands being entered while playing.
This commit is contained in:
Themaister 2013-12-09 16:56:33 +01:00
parent 40861aa17d
commit 4d8c094bdf
1 changed files with 67 additions and 0 deletions
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67
input/udev_input.c
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@ -30,6 +30,9 @@
#include <libudev.h>
#include <linux/types.h>
#include <linux/input.h>
#include <linux/kd.h>
#include <termios.h>
#include <signal.h>
#ifdef HAVE_CONFIG_H
#include "../config.h"
@ -610,6 +613,68 @@ static bool open_devices(udev_input_t *udev, const char *type, device_handle_cb
return true;
}
static long oldkbmd = 0xffff;
static struct termios oldterm, newterm;
static void restore_terminal_input(void)
{
if (oldkbmd != 0xffff)
{
ioctl(0, KDSKBMODE, oldkbmd);
tcsetattr(0, TCSAFLUSH, &oldterm);
oldkbmd = 0xffff;
}
}
static void restore_terminal_signal(int sig)
{
restore_terminal_input();
kill(getpid(), sig);
}
static void disable_terminal_input(void)
{
struct sigaction sa;
// Avoid accidentally typing stuff
if (!isatty(0) || oldkbmd != 0xffff)
return;
if (tcgetattr(0, &oldterm) < 0)
return;
newterm = oldterm;
newterm.c_lflag &= ~(ECHO | ICANON | ISIG);
newterm.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON);
newterm.c_cc[VMIN] = 0;
newterm.c_cc[VTIME] = 0;
// Be careful about recovering the terminal ...
if (ioctl(0, KDGKBMODE, &oldkbmd) < 0)
return;
if (tcsetattr(0, TCSAFLUSH, &newterm) < 0)
return;
if (ioctl(0, KDSKBMODE, K_MEDIUMRAW) < 0)
{
tcsetattr(0, TCSAFLUSH, &oldterm);
return;
}
memset(&sa, 0, sizeof(sa));
sa.sa_handler = restore_terminal_signal;
sa.sa_flags = SA_RESTART | SA_RESETHAND;
sigemptyset(&sa.sa_mask);
// Trap some fatal signals.
sigaction(SIGABRT, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
sigaction(SIGFPE, &sa, NULL);
sigaction(SIGILL, &sa, NULL);
sigaction(SIGQUIT, &sa, NULL);
sigaction(SIGSEGV, &sa, NULL);
atexit(restore_terminal_input);
}
static void *udev_input_init(void)
{
udev_input_t *udev = (udev_input_t*)calloc(1, sizeof(*udev));
@ -704,6 +769,8 @@ static void *udev_input_init(void)
udev->joypad = input_joypad_init_driver(g_settings.input.joypad_driver);
input_init_keyboard_lut(rarch_key_map_linux);
disable_terminal_input();
return udev;
error: