swap for loop to POSIX shell compat

diff --git a/modules.d/90livenet/livenetroot.sh b/modules.d/90livenet/livenetroot.sh
index 305a6c25a9d52c83983919418385e4b11134e584..1f58c55ea54455a8ba0eb66ca1ab54ace353e63b 100755 (executable)
--- a/modules.d/90livenet/livenetroot.sh
+++ b/modules.d/90livenet/livenetroot.sh
@@ -18,7 +18,8 @@ info "fetching $liveurl"
 
 imgfile=
 #retry until the imgfile is populated with data or the max retries
-for (( i=1; i<=$RETRIES; i++))
+i=1
+while [ "$i" -le $RETRIES ]
 do
     imgfile=$(fetch_url "$liveurl")
 
@@ -37,6 +38,8 @@ do
 
         sleep $SLEEP
     fi
+
+    i=$((i + 1))
 done > /tmp/livenet.downloaded
 
 # TODO: couldn't dmsquash-live-root handle this?