1.\" resizewin 2.\" 3.\" Query terminal for size and inform the kernel 4.\" 5.\" Copyright 2015 EMC / Isilon Storage Division 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd May 9, 2017 29.Dt RESIZEWIN 1 30.Os 31.Sh NAME 32.Nm resizewin 33.Nd update terminal size 34.Sh SYNOPSIS 35.Nm 36.Op Fl z 37.Sh DESCRIPTION 38The 39.Nm 40utility 41queries the terminal emulator for the current window size and updates 42the size known to the kernel using the 43.Dv TIOCSWINSZ 44ioctl. 45.Pp 46The following options are available: 47.Bl -tag -width ".Fl z" 48.It Fl z 49Do nothing unless the current kernel terminal size is zero. 50This is useful when run from a user's profile (shell startup) scripts: 51querying the window size is required for serial lines, but not when 52logging in over the network, as protocols like TELNET or SSH already 53handle the terminal size by themselves. 54.El 55.Pp 56After a terminal window has been resized, running 57.Nm 58updates the kernel's window size to match the new size. 59.Pp 60.Nm 61is functionally similar to 62.Xr resize 1 , 63which is part of the 64.Xr xterm 1 Pq Pa ports/x11/xterm 65distribution. 66However, 67.Nm 68only works with VT100/ANSI-compatible terminals and does not emit 69commands to set environment variables. 70.Pp 71The terminal is assumed to be VT100/ANSI compatible. 72The VT100/ANSI escape sequences are supported by virtually all modern 73terminals, including xterm, konsole, gnome-terminal, iTerm, 74Terminal.app, and PuTTY. 75.Sh SEE ALSO 76.Xr stty 1 , 77.Xr tty 4 78.Sh HISTORY 79The 80.Nm 81command first appeared in 82.Fx 11.0 . 83