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|
die() {
printf '%s: ' $(basename $0)
printf "$@" >&2
exit 1
}
main() {
om4=text_m4
while getopts O: opt; do
case $opt in
O)
if ! command -v "${OPTARG}_m4" >/dev/null 2>/dev/null; then
die 'invalid output type %s\n' "$OPTARG"
fi
om4=${OPTARG}_m4
;;
?) exit 1;;
esac
done
shift $((OPTIND - 1))
if [ $# -eq 0 ]; then
$om4 - | m4
else
while [ $# -gt 0 ]; do
$om4 $1 | m4
shift
done
fi
}
main "$@"
|
