26 lines
650 B
Bash
Executable file
26 lines
650 B
Bash
Executable file
#!/usr/bin/env bash
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usage() {
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echo "at - exit after the specified datetime"
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echo "Usage:"
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echo " at <DATETIME> && command..."
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echo
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echo "Examples:"
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echo " at 15:00:00 && echo \"it is 3 o'clock\""
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}
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[[ -z "$1" ]] && { echo "error: no DATE argument provided" >&2; usage; exit 1; }
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d="$(date -d "${@}" +%s)"
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_dt=$((d - $(date +%s)))
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days=$((_dt / 86400))
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printf 'Started at %s (with duration %sd %s)\n' "$(date)" "$days" "$(date -u --date @$((_dt)) +%H:%M:%S)"
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while [[ "$d" -ge "$(date +%s)" ]]; do
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_dt=$((d - $(date +%s)))
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days=$((_dt / 86400))
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printf "\r%sd %s " "$days" "$(date -u --date @$((_dt)) +%H:%M:%S)";
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sleep 0.1
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done
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exit 0
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