25 lines
628 B
Bash
Executable file
25 lines
628 B
Bash
Executable file
#!/usr/bin/env bash
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function usage {
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echo "countdown - exit after a certain amount of time has passed"
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echo " Usage:"
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echo " countdown <SECONDS> && command..."
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echo
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echo " Examples:"
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echo ' countdown 120 && echo "Two minutes has elapsed!"'
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}
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[[ $# -lt 1 ]] && { printf "error: no SECONDS argument provided\n" >&2; usage; exit 1; }
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d=$(($(date +%s) + $1));
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printf 'Started at %s\n' "$(date)"
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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 @$((_dt)) +%H:%M:%S)";
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sleep 0.1
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done
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printf "\rCountdown finished %s\n" "$(date)"
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