disallowing subshell in More

[Robert Viduya]

><
Posted from  vip at philabs.UUCP
> >It's beginning to look like the law of diminishing returns is taking
> >effect - you might want to write a simple pager that doesn't do anything
> >other than page files.  (I didn't even think about "more"s escape to "vi",
> >because I never use it - that's one problem with big programs with a large
> >set of features that few people are 100% familiar with.)  Try "p", shown
> >in Kernighan and Pike starting on p. 180.
> 
> Okay, Guy, great.  But what if you want your users to use a program like 
> vi?  Then what?  I would like users to be able to use an editor.  Vi and 
> most other editors, with the exception of some of the third-party
> (expensive) stuff, allow the user to escape to a shell.
> 

System V has an editor called red(1) which is just a restricted version of
ed(1).  The restrictions are that you can only edit files in the current
directory and the '!' shell escape command is disallowed.

				robert
-- 
Robert Viduya
Georgia Institute of Technology

...!{akgua,allegra,amd,hplabs,ihnp4,masscomp,ut-ngp}!gatech!gitpyr!robert
...!{rlgvax,sb1,uf-cgrl,unmvax,ut-sally}!gatech!gitpyr!robert