#!/usr/bin/bash
# sanity.sh, 2002-Oct-01, gash, http://www.moosenugget.org
#
# Demonstration script to verify a sane environment.
################################################################################

#
# Set a sane PATH
#

export PATH="/usr/bin:/bin:/usr/local/bin:/usr/sbin:/sbin:/usr/local/sbin"

#
# Binaries that are required by our script
#

BINARIES="awk echo egrep ifconfig ipchains logger mail"

#
# Verify BASH version
#

if [ -z "${BASH_VERSINFO[0]}" -o -z "$BASH_VERSION" ] ; then
  echo -e "\n\nCould not verify BASH version. Quitting.\n"
  exit 1
fi

if [ "${BASH_VERSINFO[0]}" -lt "2" ] ; then
  echo -e "\n\nThis script requires BASH version 2 or greater. Quitting.\n"
  echo -e "  Your version reports: $BASH_VERSION\n"
  echo -n "Download a newest version from "
  echo -e "http://www.gnu.org/directory/bash.html\n\n"
  exit 1
fi

#
# Verify that our support files exist before we kick off
#

for BIN in $BINARIES ; do
  type $BIN >/dev/null 2>&1 \
    || { echo -e "\n${BIN} not found in:\n  ${PATH}.\n\nQuitting." ; exit 1; }
done

#
# Some scripts like to be run by root only
#

if [ ! "0${UID}0" = "000" ] ; then
  echo -e "\nPlease run this script as root. Quitting.\n\n"
  exit 1
fi

#
# Ready to roll, begin script below
#

echo "A hollow voice says \"plugh\"."