Shell Programming and Scripting

#! /bin/sh

HOST=`uname -n`
MAILTO=rajeshneemkar@gmail.com

LOGFILE=/sybase/B10/ASE-15_0/install/B10.log
LOGBASE=`basename ${LOGFILE} .log`
LOGSENT=${LOGBASE}.notified
LOGLAST=${LOGBASE}.lastline

LOOKFOR="corrupt"
LOOKFOR="${LOOKFOR}|critical"
LOOKFOR="${LOOKFOR}|deadlock"
LOOKFOR="${LOOKFOR}|error"
LOOKFOR="${LOOKFOR}|fail"
LOOKFOR="${LOOKFOR}|infected"
LOOKFOR="${LOOKFOR}|logsegment"
LOOKFOR="${LOOKFOR}|no_log"
LOOKFOR="${LOOKFOR}|problem"
LOOKFOR="${LOOKFOR}|severity"
LOOKFOR="${LOOKFOR}|signal"
LOOKFOR="${LOOKFOR}|stacktrace"
LOOKFOR="${LOOKFOR}|suspect"
LOOKFOR="${LOOKFOR}|threshold"

IGNORED="background task error"

#-------------------------------------------------------------------------------
# initialize notification and lastline files

touch ${LOGSENT}

if [ ! -f ${LOGLAST} ]; then # start at the beginning
  echo 0 > ${LOGLAST}
fi

LASTPREV=`cat ${LOGLAST}`
LASTLINE=`wc -l < ${LOGFILE}`
echo ${LASTLINE} > ${LOGLAST}

if [ ${LASTLINE} -lt ${LASTPREV} ]; then # file has been trimmed
  LASTPREV=0
fi

#-------------------------------------------------------------------------------
# extract lines of interest

TMPFILE=`mktemp`
NEWFILE=`mktemp`

trap "rm -f ${TMPFILE} ${NEWFILE}" EXIT

if [ -f ${LOGFILE} ]; then
  tail -n +$(( ${LASTPREV} + 1 )) ${LOGFILE} \
  | egrep -i  "${LOOKFOR}" \
  | egrep -iv "${IGNORED}" \
  | sort -u
else
  echo ${HOST}:${LOGFILE}: no such file or directory
fi > ${TMPFILE}

comm -23 ${TMPFILE} ${LOGSENT} > ${NEWFILE} # new error messages

if [ -s ${NEWFILE} ]; then # send out new messages
  sort -o ${LOGSENT} ${LOGSENT} ${NEWFILE} # update message cache
  mailx -s "Errors - ${LOGFILE##*/} on ${HOST}" < ${NEWFILE}
fi

LOGFILE=/sybase/B10/ASE-15_0/install/B10.log
LOGBASE=`basename ${LOGFILE} .log`
LOGSENT=${LOGBASE}.notified
LOGLAST=${LOGBASE}.lastline

LOOKFOR="corrupt"
LOOKFOR="${LOOKFOR}|critical"
    ....snip....
IGNORED="background task error"

tail -n +$(( ${LASTPREV} + 1 )) ${LOGFILE} \
  | egrep -i  "${LOOKFOR}" \
  | egrep -iv "${IGNORED}" \
  | sort -u

comm -23 ${TMPFILE} ${LOGSENT} > ${NEWFILE}

LOOKFOR="\
corrupt
critical
deadlock
error
fail
infected
logsegment
no_log
problem
severity
signal
stacktrace
suspect
threshold"

if [ -f ${LOGFILE} ]; then
 tail -n +$(( ${LASTPREV} + 1 )) ${LOGFILE} \
 | grep -Eif "${LOOKFORS}" \
 | grep -Eivf "${IGNORES}" \
 | sort -u
else

\<corrupt\>
\<critical\>
  ... snip ...
\<suspect\>
\<threshold\>

background task error

logwatch [-e emiladdr] [-l lookfors] [-i ignores] [-n notified] [-l lastline] logfile

tail -n +$(( ${LASTPREV} + 1 )) ${LOGFILE} \
| egrep -i  "${LOOKFOR}" \

tail -n +$(( ${LASTPREV} + 1 )) ${LOGFILE} \
| sed -e 's/^[^>]*> //' \
| egrep -i  "${LOOKFOR}" \