VSUSP
tmp.t_suspc = tty->termios.c_cc[VSUSP];
tmp.t_dsuspc = tty->termios.c_cc[VSUSP];
tty->termios.c_cc[VSUSP] = tmp.t_suspc;
[VSUSP] = 'Z'-0x40, \
#define SUSP_CHAR(tty) ((tty)->termios.c_cc[VSUSP])