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# Print input, but include filenames as headings
# Assume stdin if no options given
[ "$#" -gt 0 ] || set -- -
# Iterate through arguments
for arg ; do
# We'll print the filename "-stdin-" rather than - just to be slightly more
# explicit
case $arg in
-) fn=-stdin- ;;
*) fn=$arg ;;
esac
[ -n "$tail" ] && printf '\n'
tail=1
# Form the underline; is there a nicer way to do this in POSIX sh?
ul=$(printf %s "$fn"|tr '[:print:]' -)
printf '%s\n%s\n\n' "$fn" "$ul"
cat -- "$arg"
done
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