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.\" $FreeBSD$ 29.\" 30.Dd May 9, 2017 31.Dt RESIZEWIN 1 32.Os 33.Sh NAME 34.Nm resizewin 35.Nd update terminal size 36.Sh SYNOPSIS 37.Nm 38.Op Fl z 39.Sh DESCRIPTION 40The 41.Nm 42utility 43queries the terminal emulator for the current window size and updates 44the size known to the kernel using the 45.Dv TIOCSWINSZ 46ioctl. 47.Pp 48The following options are available: 49.Bl -tag -width ".Fl z" 50.It Fl z 51Do nothing unless the current kernel terminal size is zero. 52This is useful when run from a user's profile (shell startup) scripts: 53querying the window size is required for serial lines, but not when 54logging in over the network, as protocols like TELNET or SSH already 55handle the terminal size by themselves. 56.El 57.Pp 58After a terminal window has been resized, running 59.Nm 60updates the kernel's window size to match the new size. 61.Pp 62.Nm 63is functionally similar to 64.Xr resize 1 , 65which is part of the 66.Xr xterm 1 67distribution. 68However, 69.Nm 70only works with VT100/ANSI-compatible terminals and does not emit 71commands to set environment variables. 72.Pp 73The terminal is assumed to be VT100/ANSI compatible. 74The VT100/ANSI escape sequences are supported by virtually all modern 75terminals, including xterm, konsole, gnome-terminal, iTerm, 76Terminal.app, and PuTTY. 77.Sh SEE ALSO 78.Xr stty 1 , 79.Xr tty 4 80.Sh HISTORY 81The 82.Nm 83command first appeared in 84.Fx 11.0 . 85