#!/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: LicenseRef-CNCL-1.1 OR LicenseRef-CCLA-1.1
# 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

#######################################
# Scanner for 'libwrap' usage.
# Globals:
#   CGRE
#   CRES
#   NL
# Arguments:
#   None
#######################################
scanlw() {
  printf "%s🔍 Scanning all running processes for 'libwrap' usage ... %s%s" "${CGRE}" "${CRES}" "${NL}"
  printf "\n"

  ### Collect binaries from all running PIDs.
  declare pid exe_path comm user

  for pid in $(ps -e -o pid=); do
    exe_path=$(readlink -f "/proc/${pid}/exe" 2>/dev/null)

    ### Skip if not a regular executable.
    [[ -x "${exe_path}" ]] || continue

    ### Check if the binary is linked with libwrap.
    # shellcheck disable=SC2312
    if ldd "${exe_path}" 2>/dev/null | grep -q "libwrap"; then
      comm=$(ps -p "${pid}" -o comm=)
      user=$(ps -p "${pid}" -o user=)
      printf "%s✅ PID: %s (%s) [User: %s] is linked with 'libwrap.so'. %s%s" "${CGRE}" "${pid}" "${comm}" "${user}" "${CRES}" "${NL}"
    fi
  done

  printf "\n"
  printf "%s✅ Scan complete. %s%s" "${CGRE}" "${CRES}" "${NL}"

  exit 0
}
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh