Merge branch 'feature/change_hostname_sh' into 'master'

Changed hostname.sh to process the unit and board serial numbers completely in sh.

See merge request !6

recipes-core/initscripts/files/hostname.sh

+#!/bin/sh
+
 url="rigadogateway.com"
+
+get_fuse () {
+    local name=$1
+    local pad=$2
+    # read the fuse and pad the left with zeros to the size of $pad
+    local fuse="0000000000"$(cat /sys/fsl_otp/$name | cut -b 3-)
+    len=$(( ${#fuse} - $pad ))
+    echo ${fuse:$len}
+}
+
+get_sn () {
+    local base=$1
+    local arena=$(get_fuse HW_OCOTP_GP$base 7)
+    if [[ ${arena:0:2} == "00" ]] ; then
+    	# starts with "00", so doesn't start with ascii hex value
+        arena=${arena:2}
+    else
+    	# doesn't start with "00", so starts with ascii hex value
+        arena=$(printf "\x${arena:0:2}${arena:2}")
+    fi
+
+    local build=$(get_fuse HW_OCOTP_GP$(( $base + 1)) 4)
+    local unit=$(get_fuse HW_OCOTP_GP$(( $base + 2)) 5)
+
+    echo "$arena$build-$unit"
+}
+
 if [[ "$(cat /sys/fsl_otp/HW_OCOTP_GP37)" == "0x0" ]] ; then
     # No unit serial number set, use board serial number
-    hostname $(board_serial_number).$url
+    hostname $(get_sn 34).$url
 else
     # unit serial number set, use it
-    hostname $(unit_serial_number).$url
+    hostname $(get_sn 37).$url
 fi