From 07e3172702817a57ef5b9546575c3d0a6378c0f4 Mon Sep 17 00:00:00 2001
From: Alan Coopersmith <[email protected]>
Date: Tue, 29 Dec 2015 18:35:41 -0800
Subject: [PATCH 11/19] vtswitch on exit

Bug 15737566/SUNBT7082840 Disabling the gdm SMF service no longer returns
 to the text console
Original date:2011-08-29 owner:yippi type:bug bugster:7082840
---
 daemon/main.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/daemon/main.c b/daemon/main.c
index 65f34c8..f3329d0 100644
--- a/daemon/main.c
+++ b/daemon/main.c
@@ -33,6 +33,7 @@
 #include <sys/wait.h>
 #include <locale.h>
 #include <signal.h>
+#include <sys/vt.h>
 
 #include <glib.h>
 #include <glib/gi18n.h>
@@ -255,12 +256,71 @@ gdm_daemon_lookup_user (uid_t *uidp,
 }
 
 static gboolean
+ck_fd_is_a_console (int fd)
+{
+#ifdef __linux__
+        struct vt_stat vts;
+#elif defined(__FreeBSD__)
+        int vers;
+#endif
+        int  kb_ok;
+
+        errno = 0;
+#ifdef __linux__
+        kb_ok = (ioctl (fd, VT_GETSTATE, &vts) == 0);
+#elif defined(__FreeBSD__)
+        kb_ok = (ioctl (fd, CONS_GETVERS, &vers) == 0);
+#else
+        kb_ok = 1;
+#endif
+
+        return (isatty (fd) && kb_ok);
+}
+
+static int
+open_a_console (const char *fnam)
+{
+        int fd;
+
+        fd = open (fnam, O_RDONLY | O_NOCTTY);
+        if (fd < 0 && errno == EACCES)
+                fd = open (fnam, O_WRONLY | O_NOCTTY);
+
+        if (fd < 0)
+                return -1;
+
+        if (! ck_fd_is_a_console (fd)) {
+                close (fd);
+                fd = -1;
+        }
+
+        return fd;
+}
+
+static gboolean
 on_shutdown_signal_cb (gpointer user_data)
 {
         GMainLoop *mainloop = user_data;
 
         g_main_loop_quit (mainloop);
 
+        /* Switch to VT1 before going down. */
+        int fd = open_a_console ("/dev/vt/active");
+        if (fd < 0) {
+                fd = open_a_console ("/dev/vt/0");
+        }
+
+        if (fd >= 0) {
+                int res;
+
+                res = ioctl (fd, VT_ACTIVATE, 1);
+
+                if (res != 0) {
+                        if (errno == ENOTSUP) {
+                                g_debug ("VT_ACTIVATE not supported, cannot switch to VT1");
+                        }
+                }
+        }
         return FALSE;
 }
 
-- 
2.7.4