From 95300a5e6be762c1c4fd4626f033d79779d3f974 Mon Sep 17 00:00:00 2001
From: Marten Richter <marten.richter@freenet.de>
Date: Sat, 6 Oct 2012 22:05:39 +0200
Subject: [PATCH] Add some VT switching and locking

---
 defines.h |  1 +
 main.cc   | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/defines.h b/defines.h
index 5358246..1bbdec6 100644
--- a/defines.h
+++ b/defines.h
@@ -112,6 +112,7 @@ long long getTimeMS();
 
   #define DEFAULT_TCP_WINDOWSIZENR 6  /*=2048*/
   #define TV_NORM_SWITCHABLE
+  #define HANDLE_VT_SWITCHING
 
   #define VOMP_LINUX_CLOCK  CLOCK_MONOTONIC
 
diff --git a/main.cc b/main.cc
index 237b233..ae156b0 100644
--- a/main.cc
+++ b/main.cc
@@ -28,6 +28,12 @@
 #endif
 
 #include "defines.h"
+
+#ifdef HANDLE_VT_SWITCHING
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <linux/vt.h>
+#endif
 #include "log.h"
 #include "timers.h"
 #include "vdr.h"
@@ -104,6 +110,11 @@ Audio* audio;
 Wol* wol;
 Sleeptimer* sleeptimer;
 
+#ifdef HANDLE_VT_SWITCHING
+int fdtty;
+struct vt_mode old_vtmode;
+#endif
+
 // Linux MVP main function and sighandler
 #ifndef WIN32
 int main(int argc, char** argv)
@@ -243,6 +254,21 @@ int main(int argc, char** argv)
 
   logger->log("Core", Log::INFO, "Signal handlers set up successfully");
 
+#ifdef HANDLE_VT_SWITCHING
+  if ((fdtty = open("/dev/tty", O_WRONLY),0) == -1) {
+	  logger->log("Core", Log::EMERG, "Could not open /dev/tty. Please change permissions");
+  } else {
+	  int free_vt;
+	  if (ioctl(fdtty,VT_OPENQRY,&free_vt)==-1 || free_vt==-1){
+		  logger->log("Core", Log::EMERG, "Could not retrieve free virtual console, please change permissions");
+	  } else {
+		  ioctl(fdtty,VT_ACTIVATE,free_vt);
+		  ioctl(fdtty,VT_WAITACTIVE,free_vt);
+		  ioctl(fdtty, VT_LOCKSWITCH, 1);
+	  }
+  }
+
+#endif
 
   // Init modules ----------------------------------------------------------------------------------------------------
   int success;
@@ -515,6 +541,10 @@ void shutdown(int code)
     delete sleeptimer;
     logger->log("Core", Log::NOTICE, "Sleeptimer module shut down");
   }
+#ifdef HANDLE_VT_SWITCHING
+  ioctl(fdtty, VT_UNLOCKSWITCH, 1);
+  close(fdtty);
+#endif
 
   if (logger)
   {
-- 
2.39.2