Comment # 4 on bug 1212141 from Stanislav Brabec

This feature was not added by me. I just ported a very old feature to systemd.

Fri Jun 14 12:58:10 CEST 2002 - sndirsch@suse.de

- boot.setup: handle Numlock depending on BIOS setting
  if KBD_NUMLOCK is set to "bios"
- sysconfig.keyboard: added "bios" to KBD_NUMLOCK description


This feature needs to read the BIOS data area. Is there a better way, how to do
it?


It basically does:

fdmem = open("/dev/mem", O_RDONLY);
lseek(fdmem, 0x497, SEEK_SET);
read (fdmem, &c, sizeof(char));
if (c & 0x02)
                printf("on\n");
        else
                printf("off\n");