#!/usr/bin/bash
###################################################################################
# Script name: scanlog
#
# This shell script scan log files for error/warning using list of file from $1
#
# example: 
# > scanlog 
#      - No parameter will scan all .log files in current directory
# > scanlog t_demog.log
# > scanlog *.log
# > scanlog t_*.log
# > scanlog -f alllogs.txt
#     -f flag to provide list of log files in file
#     -h flag to display help
#
# Author: Sarwan Singh
###################################################################################


# check for argument value
if [ "${1}" = "-h" ]; then        
	echo "Example:\n>scanlog t_demog.log"
	echo ">scanlog *.log"
	echo ">scanlog t_*.log"
	echo ">scanlog -f alllogs.txt"
	echo "    -f flag to provide list of log files in file"  
    echo "    -h flag to display help"
    exit 0;
elif [ "$1" = "-f" ]; then
	if [ "$2" = "" ]; then
		echo "\nERROR: Specify a filename with list of log files after -f."
		echo "For help use: scanlog -h"
		echo "Exiting script.\n"
		exit 0;	
	else
		infile=${2} 	
		#stop if infile does not exit
		if [ ! -e $infile ]; then    
			echo "\nERROR: '$infile' does not exist."
			echo "Exiting script.\n"
			exit 0;	
		else
			allfiles=`more $infile`		
		fi
	fi
elif [ "$1" = "" ]; then
	allfiles=`ls -al *.log | grep ^- | awk '{print $9}'`
else
    allfiles=$*
fi

### Find longest filename for printng format
maxlen=0;
for file in ${allfiles[@]}
do
	filelen=`echo ${#file}`
	if [ ${maxlen} -lt ${filelen} ]; then
		maxlen=$filelen
	fi
done

### check logs  
for file in ${allfiles[@]}
do 
	printf "Checking: ${file}"	
	
	filelen=`echo ${#file}`
	perl -e "print '.' x ($maxlen+5-$filelen);"	
	
	if [ ! -e $file ]; then    
			printf ":'$file' does not exist.\n"	
			
	elif [ -d $file ]; then    
			printf ":'$file' is directory.\n"	
			
	elif [ -f $file ]; then			
		checkfl=`check ${file}`
		if [ "$checkfl" = "" ]; then
			printf ":GOOD\n"
		else
			printf ":NOT GOOD\n"
		fi 			
	fi		
done