Show HN: A (marginally) useful x86-64 ELF executable in 301 bytes

A battery status program for x86-64 Linux laptops in the form of a 298-byte ELF executable.

Usage

$ btry 30.6 Wh / 31.1 Wh (98%)

Sometimes there are no energy_now and energy_full files, but charge_* files instead (at least on my ThinkPad X220). If this is the case, btry prints ampere hours instead of watt hours.

$ btry 2.2 Ah / 2.8 Ah (78%)

Installation

base64 -d <<< 'AAAAgAD//////////wA/kdbV/T4SKqi4gu7TNukZJeNdhjgGWjLCw6YYwm3tgKjiZLitH TPynRup8/TcSWlb7S75z0Swm5ipLfTcVY6E8/U348s4Og9wn9AgwNCgnr0A0kXHg5O3HvOy7A/FMZVjVqjQy trAuDJun4UWBOpPsREPuvRIkQw3x2/i9swEaWPcjw1UpaonANEY/kXoLt4PoHvTlNulQGdNRNiv8ceHxpgOo FPX7wLmbeMEUlwLal8kpRg74q84kP7Uic+iE8z7kFHjzyK0W1LsQLUosF8B8F+55Iw5QWtgbJ9HzPm2cUofz tBnp3vx7ERXQ+mz1jF6sqi63Op7TLjN9PbTebxoRYOfTfp88AA=' | xz -d > btry && chmod +x btry

Limitations

Anything that's not x86-64 and Linux is definitely not supported.

I don't know how standard/portable the /sys/class/power_supply/BAT0 path used actually is.

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