[MAN] tty

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TTY

Section: User Commands (1)
Updated: January 2018
Index Return to Main Contents

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NAME

tty - print the file name of the terminal connected to standard input  

SYNOPSIS

tty [,OPTION/]...  

DESCRIPTION

Print the file name of the terminal connected to standard input.

-s, --silent, --quiet

print nothing, only return an exit status

--help

display this help and exit

--version

output version information and exit

 

AUTHOR

Written by David MacKenzie.  

REPORTING BUGS

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report tty translation bugs to <http://translationproject.org/team/>  

COPYRIGHT

Copyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.  

SEE ALSO

Full documentation at: <http://www.gnu.org/software/coreutils/tty>
or available locally via: info '(coreutils) tty invocation'

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Index

NAME

SYNOPSIS

DESCRIPTION

AUTHOR

REPORTING BUGS

COPYRIGHT

SEE ALSO

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TTY

Section: Linux Programmer's Manual (4)
Updated: 2017-11-26
Index Return to Main Contents

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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(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.  

FILES

/dev/tty  

SEE ALSO

chown(1), mknod(1), ioctl(2), ioctl_console(2), ioctl_tty(2), termios(3), ttyS(4), agetty(8), mingetty(8)  

COLOPHON

This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

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Index

NAME

DESCRIPTION

TIOCNOTTY

FILES

SEE ALSO

COLOPHON

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Time: 04:45:53 GMT, September 16, 2022