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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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NAME | DESCRIPTION | FILES | SEE ALSO | COLOPHON |
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tty(4) Kernel Interfaces Manual tty(4)
tty - controlling terminal
The file /dev/tty is a character file with major number 5 and
minor number 0, usually with mode 0666 and ownership root:tty.
It is a synonym 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 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 /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.
/dev/tty
chown(1), mknod(1), ioctl(2), ioctl_console(2), ioctl_tty(2),
termios(3), ttyS(4), vcs(4), pty(7), agetty(8), mingetty(8)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.9.1.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2024-06-26. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.9.1 2024-05-02 tty(4)
Pages that refer to this page: screen(1), setterm(1), tset(1), ioctl(2), ioctl_console(2), open(2), stdin(3), ttyS(4), vcs(4), pty(7), termio(7), pam_selinux(8)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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