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filename=$2
JOLIET=true
ROCK_RIDGE=true
ISOINFO=`isoinfo -d -i "$filename"`
if echo $ISOINFO | grep "NO Joliet present" >/dev/null 2>&1; then
JOLIET=false
fi
if echo $ISOINFO | grep "NO Rock Ridge present" >/dev/null 2>&1; then
ROCK_RIDGE=false
fi
iso_extensions=""
if test $ROCK_RIDGE = true; then
iso_extensions="-R"
elif test $JOLIET = true; then
iso_extensions="-J"
fi
if test "x$3" = x-x; then
file_to_extract=$4
outfile=$5
isoinfo $iso_extensions -i "$filename" -x "$file_to_extract" > "$outfile"
else
isoinfo $iso_extensions -i "$filename" -l
fi
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