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The C and C++ Include Header Files

/usr/include/termio.h


$ cat -n /usr/include/termio.h

     1	/* Compatible <termio.h> for old `struct termio' ioctl interface.
     2	   This is obsolete; use the POSIX.1 `struct termios' interface
     3	   defined in <termios.h> instead.  */
     4	
     5	#include <termios.h>
     6	#include <sys/ioctl.h>