statusbar for the shell, written for my raspberry pi (but works everywhere

pistatus.sh

#!/bin/sh

pistatus() {
    temp="NaN"
    if [ -r /sys/class/thermal/thermal_zone0/temp ]; then
        raw=$(cat /sys/class/thermal/thermal_zone0/temp)
        deg=$((raw / 1000))
        temp="${deg}C°"
        [ "$raw" -ge 80000 ] && temp="WARN:${temp}"
    fi

    load=$(cut -d' ' -f1 /proc/loadavg)

    total=$(awk '/^MemTotal:/{print $2}' /proc/meminfo)
    available=$(awk '/^MemAvailable:/{print $2}' /proc/meminfo)
    used=$(((total - available) / 1024))
    total=$((total / 1024))

    disk=$(df -h / | awk 'NR==2{print $3"/"$2" ("$5")"}')

    up=$(awk '{s=int($1); d=s/86400; h=s%86400/3600; m=s%3600/60; printf "%dd %dh %dm", d, h, m}' /proc/uptime | sed 's/^0d //')

    printf '\e[2m[temp:%s|load:%s|ram:%dM/%dM|disk:%s|up:%s]\e[0m\n' \
        "$temp" "$load" "$used" "$total" "$disk" "$up"
}

if echo "$-" | grep -q i; then
    PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND; }pistatus"
    bind -x '"\C-l": clear; pistatus'
fi