07-14-2006
How to disable running commands from vi
Hello,
We have a requirement to disable running shell commands via vi using "!".
Can anybody please suggest how to disable this option.
The requirement arises because we open up a xterm window with a config file in vi mode for the customer to edit. After the customer edits the config file he uses :wq to quit out of it. But he can also get a shell prompt by using "!" and run shell commands. We would like to restrict customers to just editing the config file.
Any ideas on how to accomplish this would be great.
Regards,
Umesh S Sharoff
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LEARN ABOUT ULTRIX
resize
resize(1X) MIT X11R4 resize(1X)
Name
resize - utility to set TERMCAP and terminal settings to current window size
Syntax
resize [-u] [-s [row col]]
Description
The uitility prints a shell command for setting the TERM and TERMCAP 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 do not have command functions will need to send the output to a tem-
porary file and the read it back in with the ``.'' command:
$ resize >/tmp/out
$ . /tmp/out
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 is not /bin/sh.
-c 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 the Sun console escape sequences will be used instead of the special xterm escape code. If rows and col-
umns are given, resize will ask the xterm to resize itself. However, the window manager may choose to disallow the change.
Restrictions
The -u or -c must appear to the left of -s if both are specified.
There should be some global notion of display size; termcap and terminfo need to be rethought in the context of window systems. (Fixed in
4.3BSD, and ULTRIX-32 1.2)
Files
For the base termcap entry to modify.
User's alias for the command.
See Also
csh(1), tset(1), xterm(1X)
resize(1X)