#!/bin/ksh
# Final course exercise
# Enter while loop until directory name given
while :
do
print -n "Enter a directory name please: "
read idir
if [[ ! -d $idir ]]; then
	print Sorry not a directory
	continue
else
	break
fi
done
# Get a list of files into array files
set -A files `ls -l $idir | grep ^- | nawk '{print $9}'`

# Show the user all the file names
print These are the plain files in the chosen directory:-
print ${files[*]}

#Ask the user to type a list of files to be processed
print -n "Enter filename[s] from above list: "
read ifiles

#Now process the files
for fn in $ifiles
do
	print
	print Current filename is $fn
	PS3="What action would you like to take on the file?"
	select action in Copy Display Backup Quit
	do
		case $action in
			Copy) 	   print -n "Filename to copy to [$fn.bak]:- " 
				   read cpfile
				   if [[ $cpfile == "" ]]; then
					cpfile=$fn.bak
				   fi
				   if [[ -f $cpfile ]]; then
					print Sorry - $cpfile already exists
					break
				   fi
				   cp $idir/$fn $cpfile
				   break ;;
			Display)   if file $idir/$fn | grep -i script > /dev/null; then
				   	more $idir/$fn 
				   else
					print $fn is not a script
				   fi 
				   break ;;
			Backup)    if cmp -s $idir/$fn ~/logback/$fn; then
				   	print $fn and ~/logback/$fn are identical
					print Not copied
					break
				   else 
				   	cp $idir/$fn ~/logback 
				   fi
				   break ;;
			Quit) break ;;
		esac
	done
done