From 8dbc08a6f98fba1f61a8505791e0682112420302 Mon Sep 17 00:00:00 2001
From: John Klug <john.klug@multitech.com>
Date: Fri, 15 Sep 2017 11:00:54 -0500
Subject: Do not do flash upgrade when /var/volatile is full, and blink LEDS

---
 recipes-core/initscripts/initscripts-1.0/umountfs | 39 +++++++++++++++++++++--
 1 file changed, 37 insertions(+), 2 deletions(-)

diff --git a/recipes-core/initscripts/initscripts-1.0/umountfs b/recipes-core/initscripts/initscripts-1.0/umountfs
index 8c12ebe..f371554 100644
--- a/recipes-core/initscripts/initscripts-1.0/umountfs
+++ b/recipes-core/initscripts/initscripts-1.0/umountfs
@@ -49,6 +49,33 @@ blink_leds() {
   done
 }
 
+err_leds() {
+  led_dir=/sys/class/leds
+  # blink all programmable LEDs except status
+  leds=$(ls $led_dir/ | grep -v status)
+  nleds=$(echo "$leds" | wc -w)
+
+  # turn LEDs off
+  for led in $leds; do
+      echo "timer" > $led_dir/$led/trigger
+      echo 0  > $led_dir/$led/delay_off
+  done
+
+  int=200
+  total=$(( int * (nleds+1) ))
+  on=$(( total - int ))
+  off=$(( total - on ))
+
+  # make a pattern
+  for led in $leds; do
+      echo "$on"  > $led_dir/$led/delay_on
+      echo "$off"  > $led_dir/$led/delay_off
+  done
+  sleep 5
+}
+
+
+
 flash_upgrade() {
   if [ $# -ne 1 ]; then
     echo "need to specify flash-root"
@@ -188,8 +215,16 @@ flash_upgrade() {
 
   blink_leds
 
-  cp ${reboot_cmd} ${flash_dir}/upgrade-reboot
-  cp ${nandwrite_cmd} ${flash_dir}/nandwrite.static
+  if ! cp ${reboot_cmd} ${flash_dir}/upgrade-reboot ; then
+     echo "Aborting upgrade.  Failed \"cp ${reboot_cmd} ${flash_dir}/upgrade-reboot\""
+     err_leds
+     return 1
+  fi
+  if ! cp ${nandwrite_cmd} ${flash_dir}/nandwrite.static ; then
+     echo "Aborting upgrade.  Failed \"cp ${nandwrite_cmd} ${flash_dir}/nandwrite.static\""
+     err_leds
+     return 1
+  fi
   sync
   sleep 2
   mount -o remount,ro ${flash_root}
-- 
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