tty(7d) [opensolaris man page]

tty(7D) 							      Devices								   tty(7D)

NAME

       tty - controlling terminal interface

DESCRIPTION

       The  file /dev/tty is, in each process, a synonym for the control terminal associated with the process group of that process, if any. It is
       useful for programs or shell sequences that wish to be sure of writing messages on the terminal no matter how output has  been  redirected.
       It  can	also  be  used for programs that demand the name of a file for output, when typed output is desired and it is tiresome to find out
       what terminal is currently in use.

FILES

       /dev/tty

       /dev/tty*

SEE ALSO

       ports(1M), console(7D)

SunOS 5.11							    3 Jul 1990								   tty(7D)

TTY(4)							     Linux Programmer's Manual							    TTY(4)

NAME

       tty - controlling terminal

DESCRIPTION

       The  file /dev/tty is a character file with major number 5 and minor number 0, usually of mode 0666 and owner.group root.tty.  It is a syn-
       onym for the controlling terminal of a process, if any.

       In addition to the ioctl(2) requests supported by the device that tty refers to, the ioctl(2) request TIOCNOTTY is supported.

   TIOCNOTTY
       Detach the calling process from its controlling terminal.

       If the process is the session leader, then SIGHUP and SIGCONT signals are sent to the foreground process group and  all	processes  in  the
       current session lose their controlling tty.

       This ioctl(2) call only works on file descriptors connected to /dev/tty.  It is used by daemon processes when they are invoked by a user at
       a terminal.  The process attempts to open /dev/tty.  If the open succeeds, it detaches itself from the terminal by using  TIOCNOTTY,  while
       if the open fails, it is obviously not attached to a terminal and does not need to detach itself.

FILES

       /dev/tty

SEE ALSO

       chown(1), mknod(1), ioctl(2), termios(3), console(4), tty_ioctl(4), ttyS(4), agetty(8), mingetty(8)

COLOPHON

       This  page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2003-04-07								    TTY(4)