disable_leds

#!/usr/bin/env bash

set -euo pipefail -o errtrace

CONFIG=/boot/config.txt

main(){
    trap 'fail $? $LINENO' ERR

    info "\\nDisabling raspberry pi LEDs..."

    # https://www.jeffgeerling.com/blogs/jeff-geerling/controlling-pwr-act-leds-raspberry-pi
    #
    # Seems like the GH issue linked by the Jeff Geerling article has an update regarding
    # disabling the power LED. It supercedes even some info in the JG article at time
    # of writing.
    #
    # https://github.com/raspberrypi/firmware/issues/1742#issuecomment-1472359124
    printf "\n# Disable the ACT LED.\ndtparam=act_led_trigger=none\ndtparam=act_led_activelow=off\n" | sudo tee --append $CONFIG >/dev/null
    printf "\n# Disable the PWR LED.\ndtparam=pwr_led_trigger=none\n" | sudo tee --append $CONFIG >/dev/null

    info "\\nDone, please reboot for the LEDs to be disabled."
}

fail(){
    local exit_code=$1
    local line_no=$2
    local script_name
    script_name=$(basename "${BASH_SOURCE[0]}")
    die "Error in $script_name at line number: $line_no with exit code: $exit_code"
}

info(){
    echo -e "\x1b[32m$*\x1b[0m" # green stdout
}

warn(){
    echo -e "\x1b[33m$*\x1b[0m" # yellow stdout
}

die(){
    echo
    echo -e "\x1b[31m$*\x1b[0m" >&2 # red stderr
    exit 1
}

main "$@"