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Full Discussion: Command line overwrite
Operating Systems SCO Command line overwrite Post 303031166 by Don Cragun on Friday 22nd of February 2019 10:16:20 AM
Old 02-22-2019
Telling us that you're using /bin/sh without telling us what operating system you're using doesn't really tell us all that much. On many systems /bin/sh is a link to another shell (e.g., bash, dash, or ksh). On at least one system /bin/sh is an honest to God 1980's Bourne shell. (When starting a thread on unix.com, please always tell us what operating system and shell you're using. Having some idea about the environment you're using will help us give you answers that stand a better chance of working in your environment.) Unfortunately, I have no idea what shell underlies /bin/sh on SCO systems.

On systems where /bin/sh is a link to a POSIX standards-conforming shell, you could try issuing the command:
Code:
set -o vi

to turn on vi command line editing mode. Once that has been done, if you hit the <escape> key while entering a command, you can use the usual vi editor commands to erase, replace, insert, and substitute text on that line and then hitting the <enter> or <retturn> key will submit that line to the shell for processing.
 

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RESIZE(1)						      General Commands Manual							 RESIZE(1)

NAME
resize - set environment and terminal settings to current xterm window size SYNOPSIS
resize [ -u | -c ] [ -s [ row col ] ] DESCRIPTION
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. For this 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 tempo- rary file and then read it back in with the "." command: $ resize > /tmp/out $ . /tmp/out 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. 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. OPTIONS
The following options may be used with resize: -u This option indicates that Bourne shell commands should be generated even if the user's current shell isn't /bin/sh. -c This option indicates that C shell commands should be generated even if the user's current shell isn't /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. However, the window manager may choose to disallow the change. 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 option. The rows and columns arguments must appear last; though they are normally associated with the -s option, they are parsed separately. FILES
/etc/termcap for the base termcap entry to modify. ~/.cshrc user's alias for the command. ENVIRONMENT
TERM set to "xterm" if not already set. TERMCAP variable set on systems using termcap COLUMNS, LINES variables set on systems using terminfo SEE ALSO
csh(1), tset(1), xterm(1) AUTHORS
Mark Vandevoorde (MIT-Athena), Edward Moy (Berkeley) Copyright (c) 1984, 1985 by X Consortium See X(7) for a complete copyright notice. X Window System RESIZE(1)
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