pty man page doubt/question

man pty says...

   The  BSD ioctl(2) operations TIOCSTOP, TIOCSTART, TIOCUCNTL, and TIOCREMOTE
   have not been implemented under Linux.

why so? How is these operations taken care of in linux?

Solution

BSD-style PTYs have been deprecated since Linux 2.6.4. System V (UNIX 98)-style PTYs should be used instead.

That's probably the reason why these ioctl operations remain unimplemented to this day.

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