testsubtitlepngs.sh

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#!/bin/sh
 
if [ $# -ne 1 ]; then
        echo "Usage: $0 </path/to/spumux.xml>"
        exit 0
fi
 
BADPNGS="n"
 
DIR=`dirname $1`
rm -f "${DIR}/spumux.xml.bad"
 
grep png $1 | awk -F'image="' '{print $2}' | awk -F'"' '{print $1}' | while read
do
        pngtopnm <"${REPLY}" >/dev/null
        RC=$?
        if [ ${RC} -eq 1 ]; then
                echo "Bad PNG: ${REPLY}"
                if [ "${BADPNGS}" = "n" ]; then
                        BADPNGS="y"
                        /bin/echo -n >"${DIR}/spumux.xml.bad" "${REPLY}"
                else
                        /bin/echo -n >>"${DIR}/spumux.xml.bad" "\\|${REPLY}"
                fi
        fi
done
 
cat "${DIR}/spumux.xml.bad"
 
if [ -e "${DIR}/spumux.xml.bad" ]; then
        BADPNGS=`cat "${DIR}/spumux.xml.bad"`
        grep -v "${BADPNGS}" "$1" >"${DIR}/spumux.xml.new"
#       mv "${DIR}/spumux.xml" "${DIR}/spumux.xml.old"
        mv "${DIR}/spumux.xml.new" "${DIR}/spumux.xml"
        rm "${DIR}/spumux.xml.bad"      
fi