Battery for tmux in FreeBSD

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

Compile with

cc -Os battery.c -o battery

In ~/.tmux.conf setup the status bar like the following, with the correct path to the executable.

set-option -g status-right "#(/path/to/battery)"