tty — controlling terminal
/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
Detach the calling process from its controlling terminal.
If the process is the session leader, then
SIGCONT signals are sent to the
foreground process group and all processes in the current
session lose their controlling tty.
This ioctl(2) call works only
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
the open succeeds, it detaches itself from the terminal by
TIOCNOTTY, while if the
open fails, it is obviously not attached to a terminal and
does not need to detach itself.
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Copyright (c) 1993 Michael Haardt (michaelmoria.de),
Fri Apr 2 11:32:09 MET DST 1993
This is free documentation; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
The GNU General Public License's references to "object code"
and "executables" are to be interpreted as the output of any
document formatting or typesetting system, including
intermediate and printed output.
This manual is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public
License along with this manual; if not, see
Modified 1993-07-24 by Rik Faith (faithcs.unc.edu)
Modified 2003-04-07 by Michael Kerrisk