#!/bin/sh

# $Ximalas$

PATH=/bin:/sbin:/usr/bin

DMESG_BASE=/tmp
DMESG_OLD=${DMESG_BASE}/dmesg.old
DMESG_NEW=${DMESG_BASE}/dmesg.new
DMESG_DIFF=${DMESG_BASE}/dmesg.diff

DIFF_PARAM="-u"

RCPT=trond@localhost

if [ ! -f ${DMESG_OLD} ]; then
  dmesg > ${DMESG_OLD};
fi

dmesg > ${DMESG_NEW}

if ! diff ${DIFF_PARAM} ${DMESG_OLD} ${DMESG_NEW} > ${DMESG_DIFF}; then
  mail -s "dmesg changed" ${RCPT} < ${DMESG_DIFF};
  mv ${DMESG_NEW} ${DMESG_OLD};
fi

exit 0