#!/bin/sh -x
#
#
#
PRINTF=/usr/bin/printf
EGREP=/usr/bin/egrep
TAIL=/usr/bin/tail
COPY=/usr/bin/cp
CAT=/usr/bin/cat
LOG_FILE="$1"
LOG_PATH="/var/log/$1"
#To check if log file to check has been given as argument when running the script
if [ $# -ne 0 ] ; then
           $PRINTF "%s: Is the name of the log file you will be scanning. \n" $1
           $PRINTF $LOG_FILE"\n"
           $PRINTF $LOG_PATH"\n"

                if [ -f $LOG_PATH ];       #if logfile exits
                then
                        echo "File $LOG_FILE exists \n"
                        $COPY $LOG_PATH ./  #create copy of original log file in current directory
                        $CAT -n $LOG_FILE > ./tmp_log #Store a copy of original log file in a temporary log file with number index

                        # script to check for string to search
                        SEARCH=`$EGREP -i 'error|warning' $1` #search for strings error or warning in any form
#                       SCAN_LOG=`$TAIL $1|[${SEARCH}]`  #scanning logfile for string pattern

                        # script to send simple email
                        SUBJECT="Error/Warning messages in logfile" # email subject
                        RECIPIENT="validmailid@domain.extension" # Email To ?
#                       EMAILMESSAGE="$SCAN_LOG" # Email text/message
                        EMAILMESSAGE="$SEARCH" # Email text/message
                        echo "mail not sent yet"
                        $PRINTF "%s\n" "$EMAILMESSAGE" | /bin/mailx -s "$SUBJECT" "$RECIPIENT"  #send email with subject message to specified mail id
                                echo "mail sent"
                else
                        echo "File $LOG_FILE does not exists \n"
                fi

        else
           $PRINTF "%s: Need the name of the log that needs to be checked\n" $0
#       EXIT (1)
fi

> sh logmon1 log.04
log.04: Is the name of the log file you will be scanning.
log.04
/../../../../log.04
File log.04 exists

mail not sent yet
mail sent
>