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@metmajer
Last active Jan 27, 2016
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Wait for command to execute successfully
#!/bin/bash
WAIT_CMD=$1
WAIT_TIME_S=${2:-10}
WAIT_INTERVAL_S=${WAIT_INTERVAL_S:-1}
WAIT_NUM_LOOPS=$(($WAIT_TIME_S / $WAIT_INTERVAL_S))
if [ $WAIT_INTERVAL_S -gt $WAIT_TIME_S ]; then
echo "Error: \$WAIT_INTERVAL_S must be <= \$WAIT_TIME_S"
exit 1
fi
is_ready() {
eval "$WAIT_CMD"
}
i=0
while ! is_ready; do
i=$(($i + 1))
if [ "$i" -ge "$WAIT_NUM_LOOPS" ]; then
echo "Error: '${WAIT_CMD}' still not ready after ${WAIT_TIME_S}s"
exit 1
fi
sleep $WAIT_INTERVAL_S
done
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