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abrasive/onchange.sh

Created December 1, 2015 00:29
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onchange.sh
#!/bin/sh
# usage: onchange [interval] "[command to monitor]" "[command to run]"
STATE=$(eval $2 | md5sum)
while true; do
sleep $1
NEWSTATE=$(eval $2 | md5sum)
if [ "$NEWSTATE" != "$STATE" ]; then
eval $3
STATE="$NEWSTATE"
fi
done
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