OchiLinux84/bye at main · ochi84/OchiLinux84 · GitHub

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#!/usr/bin/env bash
#
#  _
# | |__  _   _  ___
# | '_ \| | | |/ _ \
# | |_) | |_| |  __/
# |_.__/ \__, |\___|
#        |___/
#
# Script        : bye
# Location      : /usr/local/bin/bye
# Author        : Jens Ochmann
# Date          : 2025‑04‑20
# License       : MIT
# Description   : Graceful system shutdown with optional message
# Requires root : Will elevate via sudo if needed
#

set -euo pipefail

#––– Helper ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
err() { printf 'bye: %s\n' "$*" >&2; exit 1; }

# Optional Benutzernachricht (wird an shutdown übergeben)
MSG=${1:-"System wird heruntergefahren – bis bald!"}

#––– Privilege handling ––––––––––––––––––––––––––––––––––––––––––––––––––––––––
if (( EUID != 0 )); then
  # Script wurde nicht als root gestartet → sudo versuchen
  exec sudo --preserve-env=MSG "$0" "$MSG"
fi

#––– Shut down ––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
logger -t bye "$MSG"

if command -v systemctl >/dev/null 2>&1; then
  # systemd‑Way
  systemctl poweroff
else
  # Fallback (SysV / BusyBox u. a.)
  /sbin/shutdown -P now "$MSG"
fi