1 files changed, 9 insertions, 9 deletions
diff --git a/sup b/sup
index eb7f71d..03237fe 100755
--- a/sup
+++ b/sup
@@ -10,9 +10,9 @@ delay=30
 times_ran=0
 
 cleanup() {
-  if [ -n "$pid" ]; then
+  if [[ -n "$pid" ]]; then
     echo "killed... $pid" >&2
-    kill $pid
+    kill "$pid"
   fi
   exit
 }
@@ -75,23 +75,23 @@ done
 command=("$@")
 
 while :; do
-  times_ran=$(($times_ran+1))
-  if [ $times_ran -gt $delay_after ]; then
-    echo "sleeping for $delay seconds after $(($times_ran-1)) runs in $delay_reset_after seconds" >&2
-    sleep $delay
+  times_ran=$((times_ran+1))
+  if [[ $times_ran -gt $delay_after ]]; then
+    echo "sleeping for $delay seconds after $((times_ran-1)) runs in $delay_reset_after seconds" >&2
+    sleep "$delay"
   fi
 
-  time_started=`date +%s`
+  time_started=$(date +%s)
   echo -n "running... " >&2
 
-  ${command[@]} &
+  "${command[@]}" &
   pid=$!
   echo PID: $pid >&2
   wait $pid
   pid=""
 
   # reset counter if run long enough
-  if [ $(($time_started+$delay_reset_after)) -lt `date +%s` ]; then
+  if [[ $((time_started+delay_reset_after)) -lt $(date +%s) ]]; then
     times_ran=0
   fi
 done