make status bar scripts posix compliant

.local/bin/statusbar/sb-forecast

@@ -7,8 +7,8 @@
 # You could set up a shell alias to view the full file in a pager in the
 # terminal if desired. This function will only be run once a day when needed.
 # Options can be found at https://wttr.in/:help
-weatherreport="${XDG_DATA_HOME:-$HOME/.local/share}/weatherreport"
-weatheremoji="${XDG_DATA_HOME:-$HOME/.local/share}/weatheremoji"
+weatherreport="${XDG_CACHE_HOME:-$HOME/.cache}/weatherreport"
+weatheremoji="${XDG_CACHE_HOME:-$HOME/.cache}/weatheremoji"
 url="wttr.in/Karlsruhe"
 opt="?F"
 emojiopt="?format=1"
@@ -25,15 +25,15 @@ s/🌧//
 s/🌨//
 s/🌩//
 s/🌫//
-' ${weatheremoji}
+' "${weatheremoji}"
 }
 getforecast() { curl -sf "$url$opt" > "$weatherreport" && curl -sf "$url$emojiopt" > "$weatheremoji" || exit 1 ;}
 
 # Some very particular and terse stream manipulation. We get the maximum
 # precipitation chance and the daily high and low from the downloaded file and
 # display them with coresponding emojis.
-showweather() { emoji=$(cat $weatheremoji) && printf "%s" "$(sed '16q;d' "$weatherreport" |
-	grep -wo "[0-9]*%" | sort -rn | sed "s/^/ ${emoji:0:1} /g;1q" | tr -d '\n')"
+showweather() { emoji=$(cat "$weatheremoji") && printf "%s" "$(sed '16q;d' "$weatherreport" |
+	grep -wo "[0-9]*%" | sort -rn | sed "s/^/ $(printf %.1s "$emoji") /g;1q" | tr -d '\n')"
 sed '13q;d' "$weatherreport" | grep -o "m\\([-+]\\)*[0-9]\\+" | sed 's/+//g' | sort -n -t 'm' -k 2n | sed -e 1b -e '$!d' | tr '\n|m' ' ' | awk '{print "  " $1 "°"," " $2 "°"}' ;}
 
 case $BLOCK_BUTTON in

.local/bin/statusbar/sb-mailbox

@@ -4,7 +4,7 @@
 # When clicked, brings up `neomutt`.
 
 case $BLOCK_BUTTON in
-	1) setsid -f claws-mail --alternate-config-dir $CLAWSRC ;;
+	1) setsid -f claws-mail --alternate-config-dir "$CLAWSRC" ;;
 	2) setsid -f mw -Y >/dev/null ;;
 	3) notify-send " Mail module" "\- Shows unread mail
 - Shows 痢 if syncing mail

.local/bin/statusbar/sb-music

@@ -1,12 +1,12 @@
 #!/bin/sh
 
 filter() {
-  if mpc &>/dev/null && [[ $(mpc | wc -l) -eq 3 ]]; then
+  if mpc 1>/dev/null 2>&1 && [ "$(mpc | wc -l)" -eq 3 ]; then
     song=$(mpc current -f "%artist% - %title%" | xargs -0 )
-    [[ $(echo $song | wc -m) -gt 35 ]] && song="${song:0:34}…"
+    [ ${#song} -gt 35 ] && song="$(printf %.35s song)…"
     mpc | awk 'NR==2' | grep -q playing && icon="" || icon=""
     echo " $icon $song "
-  elif mpc &>/dev/null && [[ $(mpc | wc -l) -eq 1 ]]; then
+  elif mpc 1>/dev/null 2>&1 && [ "$(mpc | wc -l)" -eq 1 ]; then
     echo " ﱙ "
   else
     exit 1

.local/bin/statusbar/sb-volume

@@ -7,7 +7,7 @@ case $BLOCK_BUTTON in
 	2) pamixer -t ;;
 	4) pamixer --allow-boost -i 1 ;;
 	5) pamixer --allow-boost -d 1 ;;
-	3) notify-send "📢 Volume module" "\- Shows volume 墳, ﱝ if muted.
+	3) notify-send "蓼Volume module" "\- Shows volume , ﱝ if muted.
 - Middle click to mute.
 - Scroll to change." ;;
 	6) "$TERMINAL" -e "$EDITOR" "$0" ;;