The termios structure

Programs that need to control I/O flags for terminals can do this by means of the termios structure defined in the header termios.h. The members of this structure include:

Member type	Array size	Member name	Definition
tcflag_t		c_iflag	input modes
tcflag_t		c_oflag	output modes
tcflag_t		c_cflag	control modes
tcflag_t		c_lflag	local modes
cc_t	NCCS	c_cc[]	control characters

The types tcflag_t and cc_t are defined in the header termios.h as unsigned integral types.