From 27fa846e34edad06669abd8cacaa0705c1490257 Mon Sep 17 00:00:00 2001
From: Jan Beich <jbeich@FreeBSD.org>
Date: Thu, 28 Jan 2021 18:13:59 +0000
Subject: [PATCH] kms: unbreak on FreeBSD

In file included from src/ws/atomic_kms_window_system.cpp:23:
In file included from src/ws/atomic_kms_window_system.h:25:
src/ws/kms_window_system.h:33:10: fatal error: 'linux/vt.h' file not found
 #include <linux/vt.h>
          ^~~~~~~~~~~~
/dev/tty0 -> Error: Failed to open active VT
/dev/ttyv0 -> Error: Failed to set VT process control mode: Operation not permitted
{VT_PROCESS, 0, 0, 0, 0} -> Error: Failed to set VT process control mode: Invalid argument
---
 src/ws/kms_window_system.cpp | 4 ++--
 src/ws/kms_window_system.h   | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/ws/kms_window_system.cpp b/src/ws/kms_window_system.cpp
index ca8220f..50057f6 100644
--- a/src/ws/kms_window_system.cpp
+++ b/src/ws/kms_window_system.cpp
@@ -251,7 +251,7 @@ ManagedResource<gbm_device*> create_gbm_device(int drm_fd)
 
 ManagedResource<int> open_active_vt()
 {
-    auto fd = open("/dev/tty0", O_RDONLY);
+    auto fd = open("/dev/tty", O_RDONLY);
     if (fd < 0)
         throw std::runtime_error{"Failed to open active VT"};
 
@@ -281,7 +281,7 @@ VTState::VTState()
             errno, std::system_category(), "Failed to get VT control mode"};
     }
 
-    vt_mode const vtm{VT_PROCESS, 0, 0, 0, 0};
+    vt_mode const vtm{VT_PROCESS, 0, SIGUSR1, SIGUSR2, SIGIO};
 
     if (ioctl(vt_fd, VT_SETMODE, &vtm) < 0)
     {
diff --git a/src/ws/kms_window_system.h b/src/ws/kms_window_system.h
index 4389ef7..6a3311e 100644
--- a/src/ws/kms_window_system.h
+++ b/src/ws/kms_window_system.h
@@ -30,7 +30,13 @@
 
 #include <xf86drmMode.h>
 #include <gbm.h>
+#if __has_include(<sys/consio.h>) // DragonFly, FreeBSD
+#include <sys/consio.h>
+#elif __has_include(<dev/wscons/wsdisplay_usl_io.h>) // NetBSD, OpenBSD
+#include <dev/wscons/wsdisplay_usl_io.h>
+#else
 #include <linux/vt.h>
+#endif
 
 class VTState
 {