Merge "Fix missing log_error in update-iso.sh"

utilities/platform-util/scripts/stx-iso-utils.sh

@@ -47,6 +47,12 @@ function common_check_requirements {
 
     local -i missing=0
 
+    which which >&/dev/null
+    if [ $? -ne 0 ]; then
+        log_error "Unable to find 'which' utility. Aborting..."
+        exit 1
+    fi
+
     for req in ${required_utils[@]}; do
         which ${req} >&/dev/null
         if [ $? -ne 0 ]; then

utilities/platform-util/scripts/update-iso.sh

@@ -17,6 +17,10 @@
 # Source shared utility functions
 source $(dirname $0)/stx-iso-utils.sh
 
+function log_error {
+    echo "$@" >&2
+}
+
 function usage {
     cat <<ENDUSAGE
 Usage: