resize - set environment and terminal settings to current xterm window size
] [ -s
[ row col
prints a shell command for setting the appropriate environment
variables to indicate the current size of xterm
window from which the
command is run.
determines the command through several steps:
- first, it finds the name of the user's shell program. It uses the
SHELL variable if set, otherwise it uses the user's data from
- then it decides whether to use Bourne shell syntax or C-Shell syntax. It
uses a built-in table of known shells, which can be overridden by the
-u and -c options.
- then resize asks the operating system for the terminal settings.
This is the same information which can be manipulated using
- then resize asks the terminal for its size in characters. Depending
on whether the " -s option is given, resize uses a
different escape sequence to ask for this information.
- at this point, resize attempts to update the terminal settings to
reflect the terminal window's size in pixels:
- if the -s option is used, resize then asks the terminal for
its size in pixels.
- otherwise, resize asks the operating system for the information and
updates that after ensuring that the window's dimensions are a multiple of
the character height and width.
- in either case, the updated terminal settings are done using a different
system call than used for stty.
- then resize updates the terminal settings to reflect any altered
values such as its size in rows or columns. This affects the values shown
- finally, resize writes the shell command for setting the
environment variables to the standard output.
For resize's output to take effect, resize
must either be evaluated as
part of the command line (usually done with a shell alias or function) or else
redirected to a file which can then be read in. From the C shell (usually
known as /bin/csh
), the following alias could be defined in the user's
% alias rs 'set noglob; eval `resize`'
After resizing the window, the user would type:
Users of versions of the Bourne shell (usually known as /bin/sh
don't have command functions will need to send the output to a temporary file
and then read it back in with the “.” command:
$ resize > /tmp/out
$ . /tmp/out
The following options may be used with resize
- This option indicates that C shell commands should be generated even if
the user's current shell is not /bin/csh.
- -s [rows columns]
- This option indicates that Sun console escape sequences will be used
instead of the VT100-style xterm escape codes. If rows and
columns are given, resize will ask the xterm to
resize itself using those values.
- Both of the escape sequences used for this option (first to obtain the
window size and second to modify it) are subject to xterm's
allowWindowOps resource setting. The window manager may also choose
to disallow the change.
- The VT100-style escape sequence used to determine the screen size always
works for VT100-compatible terminals. VT100s have no corresponding way to
modify the screensize.
- This option indicates that Bourne shell commands should be generated even
if the user's current shell is not /bin/sh.
- This causes resize to print a version number to the standard
output, and then exit.
Note that the Sun console escape sequences are recognized by XFree86
and by dtterm
. The resize
program may be installed
, which causes makes it assume the -s
arguments must appear last; though they are
normally associated with the -s
option, they are parsed separately.
- for the base termcap entry to modify.
- user's alias for the command.
- Resize determines the user's current shell by first checking if
$SHELL is set, and using that. Otherwise it determines the user's
shell by looking in the password file (/etc/passwd). Generally
Bourne-shell variants (including ksh) do not modify $SHELL,
so it is possible for resize to be confused if one runs
resize from a Bourne shell spawned from a C shell.
- Resize sets this to "xterm" if not already set.
- Resize sets this variable on systems using termcap, e.g., when
resize is linked with the termcap library rather than a
terminfo library. The latter does not provide the complete text for
a termcap entry.
- COLUMNS, LINES
- Resize sets these variables on systems using terminfo. Many
applications (including the curses library) use those variables when set
to override their screensize.
Mark Vandevoorde (MIT-Athena), Edward Moy (Berkeley)
Thomas Dickey (invisible-island.net).
Copyright (c) 1984, 1985 by X Consortium
for a complete copyright notice.