system command

[Kenneth Brody]

Quoting Fairlight (Mon, 31 Oct 2005 20:48:00 -0500):

[...]
> > Remember, in order to do something like:
> >
> >     echo '\033'
> >
> > you need to escape the backslash to get the shell to see it:
> >
> >     sh -c "echo '\\033'"
> >
> > (Note: I have not actually verified the above, as I'm not on a *nix
> > box at the moment.)
>
> Not from what I'm seeing.  The point in fact is that his single
> backslash in "\033" shows up in `less` as an actual binary ESC code.
>  So...no, it doesn't -seem- that you need to escape it an extra level.
[...]

Let's make this "simpler".  Try echoing a backslash.

>From the command prompt:

    echo \\

But, in order to call the shell to echo a backslash you need:

    sh -c "echo \\\\"

==========
$ echo \\
\
$ sh -c "echo \\"
sh: -c: line 2: syntax error: unexpected end of file
$ sh -c "echo \\\\"
\
$
==========


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