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https://man7.org/linux/man-pages/man2/PIO_CMAP.2const.html
ioctl_kd(2) - Linux manual page
ioctl kd 2linux manual
https://man7.org/linux/man-pages/man2/KDSETMODE.2const.html
ioctl_kd(2) - Linux manual page
ioctl kd 2linux manual
https://man7.org/linux/man-pages/man2/kdsetled.2const.html
ioctl_kd(2) - Linux manual page
ioctl kd 2linux manual