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TTY
!!!TTY
NAME
DESCRIPTION
FILES
SEE ALSO
----
!!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 synonym for the controlling
terminal of a process, if any.


In addition to the __ioctl()__ requests supported by the
device that __tty__ refers to, the following
__ioctl()__ request is supported:


__TIOCNOTTY__


Detach the current process from its controlling terminal,
and remove it from its current process group, without
attaching it to a new process group (that is, set its
process group ID to zero). This __ioctl()__ call only
works on file descriptors connected to __/dev/tty__; this
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


mknod(1), chown(1), getty(1),
termios(2), console(4),
ttys(4)
----

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Last edited on Tuesday, June 4, 2002 12:25:04 am by "perry"

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