colouredpages.sh

#!/bin/bash

FILE=$1
PAGES=$(pdfinfo ${FILE} | grep 'Pages:' | sed 's/Pages:\s*//')

GRAYPAGES=""
COLORPAGES=""
EMPTYPAGES=""

echo -e "\e[1mPages:\e[0m $PAGES"
N=1
while (test "$N" -le "$PAGES")
do
    CMYK=$( gs -q -o - -sDEVICE=inkcov -dFirstPage=$N -dLastPage=$N "$FILE" )
    CYAN=$(echo $CMYK | cut -d' ' -f1)
    MAGENTA=$(echo $CMYK | cut -d' ' -f2)
    YELLOW=$(echo $CMYK | cut -d' ' -f3)
    BLACK=$(echo $CMYK | cut -d' ' -f4)
    if [ $CYAN == "0.00000" ]
    then
    	if [ $MAGENTA == "0.00000" ]
    	then
    		if [ $YELLOW == "0.00000" ]
    		then
    			if [ $BLACK == "0.00000" ]
    			then 
    				EMPTYPAGES="$EMPTYPAGES $N"
    				GRAYPAGES="$GRAYPAGES $N"
			    	# echo "Page $N: empty"
		    	else
			    	GRAYPAGES="$GRAYPAGES $N"
			    	# echo "Page $N: grey"
		    	fi
	    	else
	    		COLORPAGES="$COLORPAGES $N"
	    		# echo "Page $N: coloured"
	    	fi
    	else
	    	COLORPAGES="$COLORPAGES $N"
	    	# echo "Page $N: coloured"
    	fi
   	else
	   	COLORPAGES="$COLORPAGES $N"
	   	# echo "Page $N: coloured"
    fi
    N=$((N+1))
done

echo -e "\e[1mEmpty:\e[0m $(echo $EMPTYPAGES | wc -w)"
echo $EMPTYPAGES
echo -e "\e[1mGrey:\e[0m $(echo $GRAYPAGES | wc -w)"
echo $GRAYPAGES
echo -e "\e[1mColoured:\e[0m $(echo $COLORPAGES | wc -w)"
echo $COLORPAGES