#!/bin/bash
 
#function name "readfile"
readfile ()
{
#function begins here
 
#declare variables
DIR=/home/jeipi/bin/routeractivity/ra-logs/             #directory where logfiles are kept
                                                #if you want to specify the full path make sure
                                                #that you begin with "/"
                                                #also must always end in "/"
LIMIT=3 #loop limit or number of tty to compare
 
#loop begins here
for ((a=1; a <= LIMIT ; a++))   # Double parentheses, and "LIMIT" with no "$".
 
do
 
eval TTY$a=`cat $DIR* | grep "$a tty $a" |wc -l`
eval echo "\$$TTY$a"#
 
done
Ttotal=$((TTY1+TTY2+TTY3))
echo $Ttotal
 
#function ends here
} #close bracket for function close
 
#check the logfiles first before running the script
if [ -a "$DIR/" ]
then
readfile
else
echo "directory does not exist"
fi