use for-loop instead of while/shift.

wled

@@ -86,13 +86,13 @@ case "$arg_inst" in
 esac
 
 # Parse and execute command argument against given instances.
-while test $# -gt 0; do
+for wled_host; do
     case "$arg_cmnd" in
         on) # Switch on.
-            api_resp=$(curl_send '{"on":true}' "http://$1/json")
+            api_resp=$(curl_send '{"on":true}' "http://$wled_host/json")
         ;;
         off) # Switch off.
-            api_resp=$(curl_send '{"on":false}' "http://$1/json")
+            api_resp=$(curl_send '{"on":false}' "http://$wled_host/json")
         ;;
         -b|--brightness) # Set brightness.
             if test -z "$arg_param"; then
@@ -108,15 +108,15 @@ while test $# -gt 0; do
                 echo "Error: parameter for brightness is out of range." >&2
                 exit 1
             fi
-            api_resp=$(curl_send "{'bri':$bright}" "http://$1/json")
+            api_resp=$(curl_send "{'bri':$bright}" "http://$wled_host/json")
         ;;
         [1-9]|1[0-7]) # Switch to preset.
-            api_resp=$(curl_send "{'ps':$arg_cmnd}" "http://$1/json")
+            api_resp=$(curl_send "{'ps':$arg_cmnd}" "http://$wled_host/json")
         ;;
         l|list) # List presets.
             printf "loading ...\r"
-            active_ps=$(active_preset "$1")
-            curl_fetch "http://$1/presets.json" | \
+            active_ps=$(active_preset "$wled_host")
+            curl_fetch "http://$wled_host/presets.json" | \
                 # Split into lines - one line per preset.
                 sed --sandbox 's/"1\?[0-9]"[[:space:]]*:/\n&/g' | \
                 # Extract number and name of every preset. Right-align numbers.
@@ -130,7 +130,7 @@ while test $# -gt 0; do
                 # Sort.
                 sort -b -n | \
                 # Prepend description and mark active preset.
-                sed --sandbox -e "1i\\Presets on $1:" \
+                sed --sandbox -e "1i\\Presets on $wled_host:" \
                               -e "s/^ \?$active_ps:.*/& */"
         ;;
         "") # Missing command.
@@ -155,7 +155,5 @@ while test $# -gt 0; do
     if test -n "$api_resp" && echo "$api_resp" | grep -qv '{\s*"success"\s*:\s*true\s*}'; then
         echo "Warning: unexpected responce from WLED API." >&2
     fi
-
-    shift
 done