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#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
clock [-o FILE] [--] CMD...
EOF
}
OUTPUT=/dev/stdout
while getopts 'o:' flag; do
case "$flag" in
(o)
OUTPUT="$OPTARG"
;;
(*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
STATUS_F="$(mkstemp)"
trap 'rm -f "$STATUS_F"' EXIT
START="$(now -E)"
statusf "$STATUS_F" "$@"
END="$(now -E)"
printf '%s %s' "$END" "$START" | awk '{ printf "%f\n", $1 - $2 }' > "$OUTPUT"
exit "$(cat "$STATUS_F")"
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