Fix for detecting zero processes and better verbose output for that case.

cpulimit-all.sh

@@ -338,14 +338,37 @@ do
         exit
     fi
     limit_by_executable
-    num_watched_before="$(echo "$watched_pids" | wc -l)"
+    if [ -z "$watched_pids" ]
+    then
+        num_watched_before=0
+    else
+        num_watched_before="$(echo "$watched_pids" | wc -l)"
+    fi
     limit_by_subprocess
-    num_watched_after="$(echo "$watched_pids" | wc -l)"
+    if [ -z "$watched_pids" ]
+    then
+        num_watched_after=0
+    else
+        num_watched_after="$(echo "$watched_pids" | wc -l)"
+    fi
     if [ "$num_watched_before" -eq "$num_watched_after" ]
     then
         if [ "$watch_interval" = "0" ]
         then
-            wait
+            if [ "$num_watched_after" -eq 0 ]
+            then
+                if [ -n "$verbose" ]
+                then
+                    echo "No processes found, exiting. Specify --watch-interval to continue scanning for processes."
+                fi
+                exit
+            else
+                if [ -n "$verbose" ]
+                then
+                    echo "Identified all processes to limit, waiting."
+                fi
+                wait
+            fi
         else
             sleep "$watch_interval"
         fi