Re: sed file processing?

On Fri, 14 Feb 2014 06:05:12 -0500 (EST), Jude DaShiell
<[email protected]> wrote:

> Is it within sed's logical capacity to check a file and only do a command 
> on that file if it has at least one line of text in it?  For what I'm 
> trying to do with a script, if the file has zero lines it should not have 
> anything done to it.

If a file has zero lines sed can't do anything on it anyway, since by
definition sed works on input lines.

$ touch a
$ sed 's/^/foobar/' a
$

Pleae note that a file that is NOT 0 bytes in size is neither an empty file
nor one with no lines of text.

-- 
D.