From: bwv549 <jtprince@...>
Date: 2006-08-10T04:30:16+09:00
Subject: access built-in shell commands like 'history' or 'fc'

How do I access built-in shell commands (like 'history' or 'fc') with a
system call?

Not what I was expecting:
  % ruby -e 'puts `history`'
      -e:1: command not found: history

But this works fine:

  % ruby -e 'puts `pwd`'
      /home/john

I've tried this:

  % ruby -e 'system "history >tmp.tmp"; puts IO.read("tmp.tmp")'

And no errors are generated, but there is nothing in tmp.tmp, either.

Thanks