Shell Programming and Scripting

if [ "X$(head -1 file.dat | awk -F\, '{print $4}')" eq "X" ] ; then
   echo "Bad file"
else 
   echo "Good file"
fi

awk -F',' '{(NF==4)?(x=0):(x=1)} END{if(x==0){print "good"}else{print "bad"}}' inputfile

#!/bin/ksh
BASE_DIR=/data/SrcFilescd 
$BASE_DIR
## finding the files from work directory which are changed in 3 day
Find . -type f -name "*.csv" -ctime 3 > /home/mydir/flist.txt
## Loop thru all the file nameswhile read linedo
## get only the base name for the file
FN=`basename $line`
## the variable DC counts the number delimiters on each line and sort them and get the unique
## for good file without any delimiter missing the count should be one
DC=`awk -F "," '{print NF}' $FN | sort | uniq -c | wc -l `
## From the above we know that the good file always have DC equal one..
if [ $DC -ne 1 ]; then
echo $DC
echo $FN >> /home/mydir/badfile.txt
## also remove the bad files that are been corrupted here by removing comments ## rm $FN
else
echo $DC
echo $FN >> /home/mydir/gfile.txt
fi done < /home/mydir/flist.txt

awk -F, 'NR==1{n=NF} n!=NF{b=1;exit} END{print b?"Bad":"Good"}' infile

awk -F, 'NR==1{n=NF} n!=NF{b=1;exit} END{exit b}' infile

awk -F, 'function pr(){print f ": " (b?"Bad":"Good")} FNR==1{if(NR>1)pr();n=NF;f=FILENAME;b=0} !b && n!=NF{b=1} END{pr()}' infile*