\x89\x50\x4E\x47\x0D\x0A\x1A\x0A
 PNG

\x89\x50\x4E\x47\x0D\x0A\x1A\x0A
#silent
u       Upper case selection
        TMPFILE=`mktemp ${MC_TMPDIR:-/tmp}/up.XXXXXX` || exit 1
        cat %b > $TMPFILE
        cat $TMPFILE| sed 's/\(.*\)/\U\1/' >%b
        rm -f $TMPFILE