#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-FileType: SOURCE
# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
# SPDX-PackageName: CISS.debian.live.builder
# SPDX-Security-Contact: security@coresecret.eu

guard_sourcing

#######################################
# Check and setup Script Priorities
# Globals:
#   BASH_SOURCE
#   VAR_HANDLER_PRIORITY
#   VAR_REIONICE_CLASS
#   VAR_REIONICE_PRIORITY
# Arguments:
#   None
# Returns:
#   0: on success
#######################################
arg_priority_check() {
  declare var=""

  printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 %s starting ... \e[0m\n" "${BASH_SOURCE[0]}"

  ### Check if nice PRIORITY is set and adjust nice priority.
  if [[ "${VAR_HANDLER_PRIORITY:-}" -ne 0 ]]; then

    if command -v renice >/dev/null; then

      renice "${VAR_HANDLER_PRIORITY}" -p "$$"
      var=$(ps -o ni= -p $$) > /dev/null 2>&1
      printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ New renice value: %s\e[0m\n" "${var}"

    else

      printf "\e[93m++++ ++++ ++++ ++++ ++++ ++++ ++ ❌ renice not installed (util-linux) \e[0m\n"

    fi

  fi

  ### Check if ionice PRIORITY is set and adjust ionice priority.
  if [[ "${VAR_REIONICE_CLASS:-}" -ne 2 ]]; then

    if command -v ionice >/dev/null; then

      ionice -c"${VAR_REIONICE_CLASS:-2}" -n"${VAR_REIONICE_PRIORITY:-4}" -p "$$"
      var=$(ionice -p $$) > /dev/null 2>&1
      printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ New ionice value: %s\e[0m\n" "${var}"

    else

      printf "\e[93m++++ ++++ ++++ ++++ ++++ ++++ ++ ❌ ionice not installed (util-linux) \e[0m\n"

    fi

  fi

  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ %s successfully applied. \e[0m\n" "${BASH_SOURCE[0]}"

  return 0
}
### Prevents accidental 'unset -f'.
# shellcheck disable=SC2034
readonly -f arg_priority_check
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh