#!/bin/sh

#root check
if [ -n "$(command -v id 2> /dev/null)" ]; then
        USERID="$(id -u 2> /dev/null)"
fi
if [ -z "${USERID}" ] && [ -n "$(id -ru)" ]; then
        USERID="$(id -ru)"
fi
if [ -n "${USERID}" ] && [ "${USERID}" != "0" ]; then
	ROOT=no
elif [ -z "${USERID}" ]; then
	ROOT=yes
fi

#usage check
if [ -z "${1}" ] || [ -z "${2}" ]; then
  printf "Usage $(basename $0) <target file> <desired pax mark>\n"
  exit 1
fi

#check target file
if [ ! -e "${1}" ]; then
  printf "Target file ${1} is missing...exiting.\n"
  exit 1
fi

#check pax marks
#TODO support passing multiple pax marks one at a time

PAX_SETTING="$(portageq envvar PAX_MARKING)"
if [ -z "${PAX_SETTING}" ]; then
  PAX_SETTING="PT"
fi

if [ "${PAX_SETTING}" = "PT XT" ]; then
  PAX_SETTING="XT"
fi

#if we got this far, we know what kind of marks portage thinks are valid.

if [ "${PAX_SETTING}" = "PT" ]; then
  /usr/sbin/paxctl-ng -L > /dev/null 2>&1
  if [ "$?" != "0" ];then
    printf "Portage seems to want PT_PAX but paxctl-ng reports it is not supported...exiting.\n"
  fi
elif [ "${PAX_SETTING}" = "XT" ]; then
  /usr/sbin/paxctl-ng -l > /dev/null 2>&1
  if [ "$?" != "0" ];then
    printf "Portage seems to want XATTR_PAX but paxctl-ng reports it is not supported...exiting.\n"
  fi
else
  printf "Unable to determine PAX setting...exiting.\n"
  exit 1
fi

#if we got this far, paxctl-ng thinks it supports whatever pax type we want

if [ "${PAX_SETTING}" = "PT" ]; then
  /usr/sbin/paxctl-ng -v "${1}" | grep PT_PAX | grep "${2}" -q
  if [ "$?" != "0" ]; then
    if [ "${ROOT}" = "no" ]; then
      printf "Pax settigs are not correct, please rerun as root once to fix it.\n"
      exit 1
    fi
    /usr/sbin/paxctl-ng -${2} ${1}
    /usr/sbin/paxctl-ng -v "${1}" | grep PT_PAX | grep "${2}" -q
    if [ "$?" != "0" ]; then
      printf "Failed to manipulate pt pax mark...exiting.\n"
      exit 1
    fi
  fi
elif [ "${PAX_SETTING}" = "XT" ]; then
  /usr/sbin/paxctl-ng -v "${1}" | grep XATTR_PAX | grep "${2}" -q
  if [ "$?" != "0" ]; then
    if [ "${ROOT}" = "no" ]; then
      printf "Pax settigs are not correct, please rerun as root once to fix it.\n"
      exit 1
    fi
    /usr/sbin/paxctl-ng -${2} ${1}
    /usr/sbin/paxctl-ng -v "${1}" | grep XATTR_PAX | grep "${2}" -q
    if [ "$?" != "0" ]; then
      printf "Failed to manipulate xattr pax mark...exiting.\n"
      exit 1
    fi
  fi
fi