Provided by: xterm_353-1ubuntu1.20.04.2_amd64 bug


       resize - set environment and terminal settings to current xterm window size


       resize [ -v | -u | -c ] [ -s [ row col ] ]


       Resize  prints  a  shell  command  for  setting  the  appropriate environment variables to
       indicate the current size of xterm window from which the command is run.

       Resize 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 /etc/passwd.

       •   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 stty.

       •   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

       •   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 by stty.

       •   finally, resize generates shell commands for setting the  environment  variables,  and
           writes that 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 .cshrc:

               %  alias rs 'set noglob; eval `resize`'

       After resizing the window, the user would type:

               %  rs

       Users of versions of the Bourne shell (usually known as /bin/sh) that 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:

       -c      This option indicates that C shell commands should be generated even if the user's
               current shell does not appear to use C shell syntax.

       -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

       -u      This  option  indicates that Bourne shell commands should be generated even if the
               user's current shell does not appear to use Bourne shell syntax.

       -v      This causes resize to print a version number to  the  standard  output,  and  then

       Note  that the Sun console escape sequences are recognized by XFree86 xterm and by dtterm.
       The resize program may be installed as sunsize,  which  causes  makes  it  assume  the  -s

       The  rows and columns arguments must appear last; though they are normally associated with
       the -s option, they are parsed separately.


       /etc/termcap   for the base termcap entry to modify.

       ~/.cshrc       user's alias for the command.


       SHELL          Unless overridden by the -c option, resize determines  the  user's  current
                      shell by

                      •   first checking if $SHELL is set, and using that,

                      •   otherwise resize looks 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.

                      After determining the user's shell, resize  checks the shell's name against
                      a table of known shell names.  If it does not find the name in  its  table,
                      resize  will  use  C  shell  syntax  for  the  generated  commands  to  set
                      environment variables.

       TERM           Resize's generated shell command sets this to "xterm" if not already set.

       TERMCAP        Resize's generated shell  command  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's  generated  shell  command  sets  these variables on systems using
                      terminfo.  Many applications  (including  the  curses  library)  use  those
                      variables when set to override their screensize.


       csh(1), stty(1), tset(1)


       Mark Vandevoorde (MIT-Athena), Edward Moy (Berkeley)
       Thomas Dickey (
       Copyright (c) 1984, 1985 by X Consortium
       See X(7) for a complete copyright notice.