/* statusbar
- battery_perc (battery percentage) [argument: battery name]
+- battery_power (battery power usage) [argument: battery name]
- battery_state (battery charging state) [argument: battery name]
- cpu_perc (cpu usage in percent) [argument: NULL]
+- cpu_freq (cpu frequency) [argument: NULL]
- datetime (date and time) [argument: format]
- disk_free (free disk space in GB) [argument: mountpoint]
- disk_perc (disk usage in percent) [argument: mountpoint]
- gid (gid of current user) [argument: NULL]
- hostname [argument: NULL]
- ip (ip address) [argument: interface]
+- kernel_release (uname -r) [argument: NULL]
+- keyboard_indicators (caps/num lock indicators) [agrument: NULL]
- load_avg (load average) [argument: NULL]
- ram_free (free ram in GB) [argument: NULL]
- ram_perc (ram usage in percent) [argument: NULL]
- uid (uid of current user) [argument: NULL]
- uptime (uptime) [argument: NULL]
- username (username of current user) [argument: NULL]
-- vol_perc (alsa volume and mute status in percent) [argument: soundcard]
+- vol_perc (oss/alsa volume status (see README)) [argument: /dev/mixer]
- wifi_perc (wifi signal in percent) [argument: wifi card interface name]
- wifi_essid (wifi essid) [argument: wifi card interface name] */
static const struct arg args[] = {