Allow to disable syscons(4) if "hw.syscons.disable" kenv is set.

Sponsored by:	The FreeBSD Foundation

2 files changed, 7 insertions, 0 deletions

diff --git a/sys/dev/syscons/syscons.c b/sys/dev/syscons/syscons.c
index b44dd53..1160f73 100644
--- a/sys/dev/syscons/syscons.c
+++ b/sys/dev/syscons/syscons.c
@@ -1589,6 +1589,11 @@ sc_cnprobe(struct consdev *cp)
     int unit;
     int flags;
 
+    if (getenv("hw.syscons.disable")) {
+	cp->cn_pri = CN_DEAD;
+	return;
+    }
+
     cp->cn_pri = sc_get_cons_priority(&unit, &flags);
 
     /* a video card is always required */
diff --git a/sys/dev/syscons/sysmouse.c b/sys/dev/syscons/sysmouse.c
index c58e9ae..f2163fc 100644
--- a/sys/dev/syscons/sysmouse.c
+++ b/sys/dev/syscons/sysmouse.c
@@ -165,6 +165,8 @@ static struct ttydevsw smdev_ttydevsw = {
 static void
 sm_attach_mouse(void *unused)
 {
+	if (getenv("hw.syscons.disable"))
+		return;
 	sysmouse_tty = tty_alloc(&smdev_ttydevsw, NULL);
 	tty_makedev(sysmouse_tty, NULL, "sysmouse");
 }