procimage1

linux脚本编程的例子

for filename in "$@"; do
    ppmfile=${filename%.*}.ppm

    case $filename in
        *.gif ) exit 0 ;;

        *.tga ) tgatoppm $filename > $ppmfile ;;

        *.xpm ) xpmtoppm $filename > $ppmfile ;;

        *.pcx ) pcxtoppm $filename > $ppmfile ;;

        *.tif ) tifftopnm $filename > $ppmfile ;;

        *.jpg ) djpeg $filename > $ppmfile ;;

            * ) echo "procfile: $filename is an unknown graphics file."
                exit 1 ;;
    esac

    outfile=${ppmfile%.ppm}.new.gif

    ppmquant -quiet 256 $ppmfile | ppmtogif -quiet > $outfile
    rm $ppmfile

done