TIOCSETD(2const) TIOCSETD(2const) NAME TIOCGETD, TIOCSETD - get or set the line discipline of the terminal LIBRARY Standard C library (libc, -lc) SYNOPSIS #include /* Definition of TIOC*ETD constants */ #include int ioctl(int fd, TIOCGETD, int *argp); int ioctl(int fd, TIOCSETD, const int *argp); DESCRIPTION TIOCGETD Get the line discipline of the terminal. TIOCSETD Set the line discipline of the terminal. RETURN VALUE On success, 0 is returned. On error, -1 is returned, and errno is set to indicate the error. SEE ALSO ioctl(2), ioctl_tty(2) Linux man-pages 6.19 2026-02-08 TIOCSETD(2const)