Fix incorrect volume state display and panel_notify.sh

os/arch/.config/panel/scripts/parse.sh

@@ -115,6 +115,7 @@ do
                 *)  vol="\ue203"
                     ;;
             esac
+            vol="%{A:volume.sh toggle:} $vol %{A}"
             ;;
     esac
     echo -e "%{l}${wm}${playing}%{r}${mail} ${wifi} ${date} ${clock} ${bt}${vol}"

os/arch/bin/panel_notify.sh

@@ -1,8 +1,11 @@
 #!/usr/bin/bash
 
-pgrep panel.sh >/dev/null || exit
-
 FIFO=/tmp/panel-fifo
 
-[[ -f $FIFO ]] || exit
+if [[ ! -p $FIFO ]]
-echo "$@" > "/tmp/panel-fifo"
+then
+    >&2 echo "FIFO not initialized"
+    exit
+fi
+
+echo "$@" > "$FIFO" &

os/arch/bin/volume.sh

@@ -2,7 +2,10 @@
 
 if [[ $# == 0 ]]
 then
-    echo "$(amixer get Master | sed -n 's/^.*\[\([0-9]\+\)%.*$/\1/p' | uniq)"
+    data=$(amixer get Master)
+    vol=$(echo "$data" | sed -n 's/^.*\[\([0-9]\+\)%.*$/\1/p' | uniq)
+    state=$(echo "$data" | grep '\[on\]')
+    [[ $state ]] && echo $vol || echo 0
     exit
 fi
 
@@ -22,5 +25,5 @@ if amixer get Master | grep '\[off\]' >/dev/null
 then
     panel_notify.sh "V0"
 else
-    panel_notify.sh "V$(amixer get Master | sed -n 's/^.*\[\([0-9]\+\)%.*$/\1/p' | uniq)"
+    panel_notify.sh "V$vol"
 fi