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CLIでbatteryのステータスを%表示
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| acpi | grep -oE \[0-9\]+% |
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| ioreg -l | awk '$3~/Capacity/{c[$3]=$5}END{OFMT="%.3f";max=c["\"MaxCapacity\""];print(max>0?100*c["\"CurrentCapacity\""]/max:"?")}' |
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