1 files changed, 118 insertions, 0 deletions
diff --git a/testing/gdm/gdm-vt-allocation-hack.patch b/testing/gdm/gdm-vt-allocation-hack.patch
new file mode 100644
index 000000000..56fa5a151
--- /dev/null
+++ b/testing/gdm/gdm-vt-allocation-hack.patch
@@ -0,0 +1,118 @@
+diff --git a/daemon/gdm-server.c b/daemon/gdm-server.c
+index 39def47..03488fd 100644
+--- a/daemon/gdm-server.c
++++ b/daemon/gdm-server.c
+@@ -33,6 +33,8 @@
+ #include <grp.h>
+ #include <signal.h>
+ #include <sys/resource.h>
++#include <sys/ioctl.h>
++#include <sys/vt.h>
+ 
+ #include <glib.h>
+ #include <glib/gi18n.h>
+@@ -150,6 +152,92 @@ _gdm_server_query_ck_for_display_device (GdmServer *server)
+         return out;
+ }
+ 
++#ifndef O_NOCTTY
++# define O_NOCTTY 0
++#endif
++
++static int
++open_vt (int vtno)
++{
++	char *vtname;
++	int fd;
++
++	vtname = g_strdup_printf ("/dev/tty%d", vtno);
++
++	do {
++		errno = 0;
++		fd = open (vtname, O_RDWR | O_NOCTTY, 0);
++	} while (errno == EINTR);
++
++	g_free (vtname);
++	return fd;
++}
++
++static gint
++find_first_probably_free_vt (void)
++{
++	int fd, fdv;
++	int vtno;
++	unsigned short vtmask;
++	struct vt_stat vtstat;
++	guint v_state;
++
++	fdv = -1;
++
++	do {
++		errno = 0;
++		fd = open ("/dev/console", O_WRONLY | O_NOCTTY, 0);
++	} while (errno == EINTR);
++
++	if (fd >= 0) {
++		if (ioctl (fd, VT_GETSTATE, &vtstat) >= 0) {
++			v_state = vtstat.v_state;
++		} else {
++			close (fd);
++			v_state = 0;
++			fd = -1;
++		}
++	} else {
++		v_state = 0;
++	}
++
++	if (fd < 0) {
++		do {
++			errno = 0;
++			fd = open ("/dev/console", O_RDONLY | O_NOCTTY, 0);
++		} while (errno == EINTR);
++
++		if (fd >= 0) {
++			if (ioctl (fd, VT_GETSTATE, &vtstat) >= 0)
++				v_state = vtstat.v_state;
++		}
++	}
++
++	for (vtno = 7, vtmask = 1 << vtno; vtmask; vtno++, vtmask <<= 1) {
++		/* Is this console in use? */
++		if (v_state & vtmask)
++			continue;
++
++		/* No, try to open it */
++		fdv = open_vt (vtno);
++		if (fdv >= 0)
++			break;
++
++		/* If we're here, kernel indicated that the console was free,
++		 * but we failed to open it. Just go on to higher VTs. */
++	}
++
++        if (fdv >= 0)
++                close (fdv);
++        else
++		vtno = -1;
++
++	if (fd >= 0)
++		close (fd);
++
++	return vtno;
++}
++
+ char *
+ gdm_server_get_display_device (GdmServer *server)
+ {
+@@ -310,6 +398,11 @@ gdm_server_resolve_command_line (GdmServer  *server,
+ 
+         if (vtarg != NULL && ! gotvtarg) {
+                 argv[len++] = g_strdup (vtarg);
++        } else if (!query_in_arglist && !gotvtarg) {
++                gint vtnum = find_first_probably_free_vt ();
++
++                if (vtnum > 0)
++                        argv [len++] = g_strdup_printf ("vt%d", vtnum);
+         }
+ 
+         argv[len++] = NULL;