sysvinit-inittab_2.88dsf.bb: Allow multiple serial port consoles to be defined

Set SERIAL_CONSOLES if you want to define multiple serial consoles, also if
you need to check for the presence of the serial consoles you can also define
SERIAL_CONSOLES_CHECK to determine if these are present when you boot. This
will prevent error message that pop up when the serial port is not present.

SERIAL_CONSOLES = "115200;ttyS0 115200;ttyS1 115200;ttyEHV0"
SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"

The above lines in machine.conf or elsewhere will have the effect of having
two serial consoles and removing any that are not present at boot

(From OE-Core rev: eecd65f188ba2c924626b7e1bf5c8e2eb51e9b59)

Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/sysvinit/sysvinit-inittab_2.88dsf.bb

@@ -2,7 +2,7 @@ DESCRIPTION = "Inittab for sysvinit"
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6"
 
-PR = "r6"
+PR = "r7"
 
 SRC_URI = "file://inittab"
 
@@ -26,7 +26,8 @@ do_install() {
     for i in $tmp
     do
 	j=`echo ${i} | sed s/\;/\ /g`
-        echo "${idx}:2345:respawn:${base_sbindir}/getty ${j}" >> ${D}${sysconfdir}/inittab
+	echo "${idx}:12345:respawn:${base_sbindir}/getty ${j}" >> ${D}${sysconfdir}/inittab
+
 	idx=`expr $idx + 1`
     done
 
@@ -51,6 +52,23 @@ EOF
     fi
 }
 
+pkg_postinst_${PN} () {
+# run this on the target
+if [ "x$D" == "x" ]; then
+	tmp="${SERIAL_CONSOLES_CHECK}"
+	for i in $tmp
+	do
+		j=`echo ${i} | sed s/^.*\;//g`
+		if [ -z "`cat /proc/consoles | grep ${j}`" ]; then
+			sed -i /^.*${j}$/d /etc/inittab
+		fi
+	done
+	kill -HUP 1
+else
+	exit 1
+fi
+}
+
 # USE_VT and SERIAL_CONSOLE are generally defined by the MACHINE .conf.
 # Set PACKAGE_ARCH appropriately.
 PACKAGE_ARCH = "${MACHINE_ARCH}"