Add a securetty file

Do not copy host securetty file - this one should be comprehensive
or bind mount host one in yourself.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

pkg/getty/etc/securetty

@@ -0,0 +1,33 @@
+console
+tty1
+tty2
+tty3
+tty4
+tty5
+tty6
+tty7
+tty8
+tty9
+tty10
+tty11
+
+# UART serial ports
+ttyS0
+ttyS1
+ttyS2
+ttyS3
+
+# IBM iSeries/pSeries virtual console, Xen
+hvc0
+hvc1
+
+#IBM pSeries console ports
+hvsi0
+hvsi1
+
+# ARM "AMBA" serial ports
+ttyAM0
+ttyAM1
+
+# s390 and s390x ports in LPAR mode
+ttysclp0

pkg/getty/usr/bin/rungetty.sh

@@ -49,13 +49,6 @@ if [ -f $ROOTSHADOW ]; then
 	echo >> /etc/shadow
 fi
 
-ROOTSTTY=/hostroot/etc/securetty
-if [ -f $ROOTSTTY ]; then
-	cp $ROOTSTTY /etc/securetty
-	# just in case someone forgot a newline
-	echo >> /etc/securetty
-fi
-
 for opt in $(cat /proc/cmdline); do
 	case "$opt" in
 	console=*)