tree fef2ee4721ebbbad10ae44a58b4c11cac5147669
parent 788d5e24ca19c6291cebd8d1ad5b5ed6abf42665
author A. Wilcox <AWilcox@Wilcox-Tech.com> 1552493771 -0500
committer Rich Felker <dalias@aerifal.cx> 1554943024 -0400

fcntl.h: define O_TTY_INIT to 0

POSIX: "[If] either O_TTY_INIT is set in oflag or O_TTY_INIT has the
value zero, open() shall set any non-standard termios structure
terminal parameters to a state that provides conforming behavior."

The Linux kernel tty drivers always perform initialisation on their
devices to set known good termios values during the open(2) call.  This
means that setting O_TTY_INIT to zero is conforming.