mirror of
https://github.com/CTCaer/RetroArch.git
synced 2024-12-26 20:54:47 +00:00
126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
/* RetroArch - A frontend for libretro.
|
|
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
|
|
*
|
|
* RetroArch is free software: you can redistribute it and/or modify it under the terms
|
|
* of the GNU General Public License as published by the Free Software Found-
|
|
* ation, either version 3 of the License, or (at your option) any later version.
|
|
*
|
|
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
|
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
|
|
* PURPOSE. See the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with RetroArch.
|
|
* If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <signal.h>
|
|
|
|
#include <linux/input.h>
|
|
#include <linux/kd.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#include "linux_common.h"
|
|
|
|
static struct termios oldTerm, newTerm;
|
|
static long oldKbmd = 0xffff;
|
|
static bool linux_stdin_claimed = false;
|
|
|
|
void linux_terminal_flush(void)
|
|
{
|
|
tcsetattr(0, TCSAFLUSH, &oldTerm);
|
|
}
|
|
|
|
void linux_terminal_restore_input(void)
|
|
{
|
|
if (oldKbmd == 0xffff)
|
|
return;
|
|
|
|
ioctl(0, KDSKBMODE, oldKbmd);
|
|
linux_terminal_flush();
|
|
oldKbmd = 0xffff;
|
|
|
|
linux_stdin_claimed = false;
|
|
}
|
|
|
|
/* Disables input */
|
|
|
|
bool linux_terminal_init(void)
|
|
{
|
|
if (oldKbmd != 0xffff)
|
|
return false;
|
|
|
|
if (tcgetattr(0, &oldTerm) < 0)
|
|
return false;
|
|
|
|
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 false;
|
|
|
|
if (tcsetattr(0, TCSAFLUSH, &newTerm) < 0)
|
|
return false;
|
|
|
|
if (ioctl(0, KDSKBMODE, K_MEDIUMRAW) < 0)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
void linux_terminal_claim_stdin(void)
|
|
{
|
|
/* We need to disable use of stdin command interface if
|
|
* stdin is supposed to be used for input. */
|
|
linux_stdin_claimed = true;
|
|
}
|
|
|
|
bool linux_terminal_grab_stdin(void *data)
|
|
{
|
|
return linux_stdin_claimed;
|
|
}
|
|
|
|
static void linux_terminal_restore_signal(int sig)
|
|
{
|
|
linux_terminal_restore_input();
|
|
kill(getpid(), sig);
|
|
}
|
|
|
|
bool linux_terminal_disable_input(void)
|
|
{
|
|
struct sigaction sa = {{0}};
|
|
|
|
/* Avoid accidentally typing stuff. */
|
|
if (!isatty(0))
|
|
return false;
|
|
|
|
if (!linux_terminal_init())
|
|
{
|
|
linux_terminal_flush();
|
|
return false;
|
|
}
|
|
|
|
sa.sa_handler = linux_terminal_restore_signal;
|
|
sa.sa_flags = SA_RESTART | SA_RESETHAND;
|
|
sigemptyset(&sa.sa_mask);
|
|
|
|
/* Trap some standard termination codes so we
|
|
* can restore the keyboard before we lose control. */
|
|
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(linux_terminal_restore_input);
|
|
|
|
return true;
|
|
}
|