sysvinit-inittab_xen: Using getty wrapper to minimize console messages

Previously the following message was printed on the console every 5
minutes:
INIT: Id "X0" respawning too fast: disabled for 5 minutes

Installing and using a getty-wrapper that will check for the hypervisor
(hvc0) device and if not present, will call sleep

Signed-off-by: Jaewon Lee <jaewon.lee@xilinx.com>
Signed-off-by: Mark Hatle <mark.hatle@xilinx.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

recipes-core/sysvinit/files/getty-wrapper

@@ -0,0 +1,8 @@
+#!/bin/sh
+if test -c /dev/"$2"
+then
+     exec /sbin/getty $*
+else
+     exec sleep 3600d
+fi
+

recipes-core/sysvinit/sysvinit-inittab_2.%.bbappend

@@ -1 +1,11 @@
 require ${@bb.utils.contains('DISTRO_FEATURES', 'xen', 'sysvinit-inittab_xen.inc', '', d)}
+
+FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+
+SRC_URI += "file://getty-wrapper"
+
+do_install_append() {
+    install -d ${D}${base_sbindir}
+    install -m 0755 ${WORKDIR}/getty-wrapper ${D}${base_sbindir}/getty-wrapper
+}
+FILES_${PN} += "${base_sbindir}/getty-wrapper"

recipes-core/sysvinit/sysvinit-inittab_xen.inc

@@ -1,4 +1,4 @@
 do_install_append() {
                 echo "" >> ${D}${sysconfdir}/inittab
-                echo "X0:12345:respawn:/sbin/getty 115200 hvc0" >> ${D}${sysconfdir}/inittab
+                echo "X0:12345:respawn:${base_sbindir}/getty-wrapper 115200 hvc0" >> ${D}${sysconfdir}/inittab
 }