#!/bin/sh

# For the Marvell units (and probably many other
# embedded headless ARM devices) we want to open a serial login 
# on ttyS0, which is done in /etc/inittab.
# We also need to be able to login as root ;-)
#
# I'm aware of the possibility that not all "Marvell" units will
# have a serial port that will appear as /dev/ttyS0 in the Linux OS
# but I'll have to deal with those on a case by case basis.
# For the time being let's assume that they all have serial ports.
#
# 14 Dec 2011:
#
# Let's just do this anyway - all of the ARM devices tend to be configureable
# from u-boot and have no graphics support until the Kernel boots.
# If anybody thinks this is a security issue, don't plug your machine into 
# a serial cable :-)
# egrep -q "Marvell" /proc/cpuinfo > /dev/null 2>&1 && \
sed -i 's?^#ttyS0?ttyS0?' etc/securetty.new

# Add the serial console for the ARM Versatile, Raspberry Pi, ODROID XU4
cat << EOF >> etc/securetty.new
ttyAMA0
ttyAMA1
ttyAMA2
ttyAMA3
ttySAC0
ttySAC1
ttySAC2
ttySAC3
EOF