27 lines
594 B
Bash
27 lines
594 B
Bash
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#!/bin/sh
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# from http://thedjbway.b0llix.net/clocksd/index.html
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#
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# clock_adjust.sh
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# periodically get timing mark for clockspeed service
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# initialize WAIT, WAIT_MAX:
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WAIT=541
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WAIT_MAX=2617923
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# loop indefinitely
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while :
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do
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# obtain timing mark for calibrating clockspeed adjust:
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clockctl mark
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# log current "attoseconds":
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clockctl atto
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echo "==="
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echo "Waiting ${WAIT} seconds until next adjustment..."
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sleep ${WAIT}
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# increment $WAIT:
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WAIT=`expr ${WAIT} + ${WAIT} + ${WAIT}`
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if [ ${WAIT} -gt ${WAIT_MAX} ] ; then
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WAIT=${WAIT_MAX}
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fi
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done
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