* function description argument (example)
*
* battery_perc battery percentage battery name (BAT0)
- * NULL on OpenBSD
+ * NULL on OpenBSD/FreeBSD
* battery_state battery charging state battery name (BAT0)
- * NULL on OpenBSD
+ * NULL on OpenBSD/FreeBSD
* battery_remaining battery remaining HH:MM battery name (BAT0)
- * NULL on OpenBSD
+ * NULL on OpenBSD/FreeBSD
* cpu_perc cpu usage in percent NULL
* cpu_freq cpu frequency in MHz NULL
* datetime date and time format string (%F %T)
* ram_total total memory size in GB NULL
* ram_used used memory in GB NULL
* run_command custom shell command command (echo foo)
+ * separator string to echo NULL
* swap_free free swap in GB NULL
* swap_perc swap usage in percent NULL
* swap_total total swap size in GB NULL
* temp temperature in degree celsius sensor file
* (/sys/class/thermal/...)
* NULL on OpenBSD
+ * thermal zone on FreeBSD
+ * (tz0, tz1, etc.)
* uid UID of current user NULL
* uptime system uptime NULL
* username username of current user NULL