77 lines
1.5 KiB
Bash
Executable File
77 lines
1.5 KiB
Bash
Executable File
#!/bin/bash
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function helpexit() {
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echo "Simple Timer."
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echo '$PREFIX is printed before the time'
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echo '$POSTFIX is printed after the time'
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echo '$TIMERPID is a PID number. When the process ends, timer ends.'
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echo 'Reset timer with kill -10'
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echo '
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# use cases:
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# timer | sleep 10
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#
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# timer &
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# sleep 10; kill -10 %1; sleep 5; kill %1
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#
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# PREFIX=$'"'"'\033[33;1m'"'"' POSTFIX=$'"'"'\033[0m'"'"' timer | sleep 5
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#
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# sleep 4 &
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# p=$!
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# TIMERPID=$p timer &
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# sleep 10
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'
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exit
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}
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for (( i=1; i<=$#; i++ )); do
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[[ "${!i}" = "--help" ]] && helpexit
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[[ "${!i}" = "-h" ]] && helpexit
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done
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function displaytime {
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local T=$1
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local D=$((T/60/60/24))
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local H=$((T/60/60%24))
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local M=$((T/60%60))
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local S=$((T%60))
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printf '\r%s[' $PREFIX
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(( $D > 0 )) && printf '%dd ' $D
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(( $T > 3599 )) && printf '%02d:' $H
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printf '%02d:%02d]%s\r' $M $S $POSTFIX
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}
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function finish_up {
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echo "Timer terminated" >&2
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displaytime "$SECONDS" >&2
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echo "" >&2
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exit
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}
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function reset {
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STARTED=$SECONDS
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}
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trap finish_up EXIT 9 15
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trap reset 10
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STARTED=$SECONDS
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while true; do
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# Were in terminal
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if [[ -t 1 ]]; then printf '\033[s'; fi
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displaytime $(( SECONDS - STARTED )) >&2
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if [[ -t 1 ]]; then printf '\033[u'; fi
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# die if parent dies
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kill -0 $PPID 2>/dev/null || { exit; }
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# if stdout is pipe, print time there
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# if pipe dies, timer dies too
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if [[ ! -t 1 ]]; then displaytime "$SECONDS"; fi
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if [[ -n "$TIMERPID" ]]; then
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kill -0 "$TIMERPID" 2>/dev/null || { exit; }
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fi
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sleep 1
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done
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