#define TTYBUFSIZE 512 struct TTYBUF { int n_in; char *nxfree; char tbuf[TTYBUFSIZE]; }; /* * tty modes */ #define T_ITT 0100000 #define T_RARE 040000 #define T_INDCTL 01000 #define T_RAW 040 #define T_CRLF 020 #define T_ECHO 010 #define T_TABS 02