change variable names inside sb scripts, and add uptime

bin/.local/bin/statusbar/sb-battery

@@ -1,5 +1,5 @@
 #!/bin/sh
 
-read -r capacity < /sys/class/power_supply/BAT1/capacity
+read -r value < /sys/class/power_supply/BAT1/capacity
 
-printf '[BAT %s%%]\n' "$capacity"
+printf '[BAT %s%%]\n' "$value"

bin/.local/bin/statusbar/sb-date

@@ -1,5 +1,5 @@
 #!/bin/sh
 
-_date=$(date '+%b %-d %Y %-I:%M %p')
+value=$(date '+%b %-d %Y %-I:%M %p')
 
-printf '[%s]\n' "$_date"
+printf '[%s]\n' "$value"

bin/.local/bin/statusbar/sb-memory

@@ -1,5 +1,5 @@
 #!/bin/sh
 
-memory=$(free -h | awk '/Mem/ {printf "%s/%s\n", $3, $2}' | sed 's/Gi/G/g; s/Mi/M/g')
+value=$(free -h | awk '/Mem/ {printf "%s/%s\n", $3, $2}' | sed 's/Gi/G/g; s/Mi/M/g')
 
-printf '[MEM %s]\n' "$memory"
+printf '[MEM %s]\n' "$value"

bin/.local/bin/statusbar/sb-uptime

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+value=$(uptime -p | sed 's/ day[s]*\b/d/g; s/ hour[s]*\b/h/g; s/ minute[s]*\b/m/g; s/up //; s/,//g')
+
+printf '[%s]\n' "$value"

bin/.local/bin/statusbar/sb-volume

@@ -1,21 +1,21 @@
 #!/bin/sh
 
-volume=$(wpctl get-volume @DEFAULT_AUDIO_SINK@)
-volume=${volume##Volume: }
-volume=${volume%%.*}${volume##*.}
+value=$(wpctl get-volume @DEFAULT_AUDIO_SINK@)
+value=${value##Volume: }
+value=${value%%.*}${value##*.}
 
-case "$volume" in
+case "$value" in
     *MUTED*)
         muted=1
-        volume=${volume%% \[MUTED\]}
+        value=${value%% \[MUTED\]}
         ;;
 esac
 
-volume=${volume#0}
-volume=${volume#0}
+value=${value#0}
+value=${value#0}
 
 if [ -z "$muted" ]; then
-    printf '[VOL %s%%]\n' "$volume"
+    printf '[VOL %s%%]\n' "$value"
 else
-    printf '[VOL %s%% M]\n' "$volume"
+    printf '[VOL %s%% M]\n' "$value"
 fi