rgb2cmykPDF.sh

#!/bin/bash
gs -o ${1%%.pdf}_cmyk.pdf \
       -dNOPAUSE -dBATCH -dSAFER \
       -sDEVICE=pdfwrite \
       -dPDFSETTINGS=/prepress \
       -dEncodeColorImages=false \
       -dEncodeGrayImages=false \
       -dEncodeMonoImages=false \
       -dOverrideICC=true \
       -dHaveTransparency=false \
       -dCompatibilityLevel=1.4 \
       -dRenderIntent=3 \
       -dDeviceGrayToK=true \
       -sDefaultCMYKProfile=/usr/share/color/icc/basICColor/ISOcoated_v2_bas.ICC \
       -sOutputICCProfile=/usr/share/color/icc/basICColor/ISOcoated_v2_bas.ICC \
       -sProcessColorModel=DeviceCMYK \
       -sColorConversionStrategy=CMYK \
       -sColorConversionStrategyForImages=CMYK \
       $1