termio - System V terminal driver interface
termio is the name of the old System V terminal driver interface. This
interface defined a termio structure used to store terminal settings,
and a range of ioctl(2) operations to get and set terminal attributes.
The termio interface is now obsolete: POSIX.1-1990
standardized a modified version of this interface, under the name
termios. The POSIX.1 data structure differs slightly from the System
V version, and POSIX.1 defined a suite of functions to replace the various
ioctl(2) operations that existed in System V. (This was done because
ioctl(2) was unstandardized, and its variadic third argument does not
allow argument type checking.)
If you're looking for a page called "termio", then you
can probably find most of the information that you seek in either
termios(3) or tty_ioctl(4).
This page is part of release 4.10 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at https://www.kernel.org/doc/man-pages/.