Battery indicator for tmux/FreeBSD

This is is a little C program to indicate the current battery state and percentage in the tmux status bar. It uses the FreeBSD sysctl and is not compatible with Linux.

Requires a font that includes utf-8 symbols. Iosevka and JetBrains Mono from NerdFonts have been tested.

Compile with

cc -Os battery.c -o battery

and copy the executable to ~/.local/bin.

In ~/.tmux.conf setup the status bar with something like

set-option -g status-right "#($HOME/.local/bin/battery)   %a, %d %b  %H:%M "