cli splash screen for raspberry pi 5

splash

#!/bin/bash
# vim:filetype=bash:

readonly _D="$(dirname "$(readlink -f "$0")")" && cd $_D

ansi_colors()
{
  esc=""

  black="$esc[30m";   red="$esc[31m";    green="$esc[32m"
  yellow="$esc[33m"   blue="$esc[34m";   purple="$esc[35m"
  cyan="$esc[36m";    white="$esc[37m"

  blackb="$esc[40m";   redb="$esc[41m";    greenb="$esc[42m"
  yellowb="$esc[43m"   blueb="$esc[44m";   purpleb="$esc[45m"
  cyanb="$esc[46m";    whiteb="$esc[47m"

  bold="$esc[1m";    boldoff="$esc[22m"
  italics="$esc[3m"; italicsoff="$esc[23m"
  ul="$esc[4m";      uloff="$esc[24m"
  inv="$esc[7m";     invoff="$esc[27m"

  reset="$esc[0m"
  r="$esc[0m"
}

ansi_colors

# 32, 33, 36
# green, yellow, cyan

h3="$reset$bold$purple"
h2="$reset$bold$yellow"
h1="$reset$bold$green"
p1="$reset"

function cpufreq()
{
    min=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_min_freq)
    cur=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_cur_freq)
    max=$(cat /sys/devices/system/cpu/cpufreq/policy0/scaling_max_freq)
    printf "%s MHz [min=%s max=%s]" $(($cur / 1000)) $(($min / 1000)) $(($max / 1000))
}


ip="$(ip route get 1.1.1.1 | head -1 | cut -d' ' -f7)"
kernel="$(uname -srm)"
os="$(source /etc/os-release; echo $NAME $VERSION)"
uptime="$(uptime -p | sed 's/up //')"
load=$(cat /proc/loadavg | cut -d ' ' -f 1,2,3)
temperature="$(vcgencmd measure_temp | cut -d '=' -f 2)"
temperature="$(vcgencmd measure_temp | tr -cd '[0-9].')"
#cpu_t1k=$(cat /sys/class/thermal/thermal_zone0/temp)
#cpu_t=$(printf %.1f "$((10**3 * $cpu_t1k / 1000))e-3")
temps="$temperature° C"
#fan_speed=$(cat /sys/devices/platform/cooling_fan/hwmon/*/fan1_input)
freq=$(cpufreq)

# Useful for repos
# version="${MOABIAN:-3.0.0}"
# branch="$(git status | head -n 1 | cut -d " " -f 3)"
# sha="$(git rev-parse HEAD | cut -c 1-4)"
# moabian_version="${version} · ${branch}:${sha^^}"

# ☉

cat <<EOF

${h2} · Hostname   ${r}${os}
${h2} · Kernel     ${r}${kernel}
${h2} · Load       ${r}${load}
${h2} · CPU        ${r}${temps}
${h2} · Frequency  ${r}${freq}
${h2} · IP         ${r}${ip}
${h1} ○ Hostname   ${h3}$(hostname)

EOF