Re: sed and limited record length

[Ralf Wildenhues]

Hi Gary,

Just addressing this now:

* Gary V. Vaughan wrote on Mon, May 22, 2006 at 11:45:01AM CEST:
> Ralf Wildenhues wrote:
> 
> >I intend to find out whether $NL2SP really is sufficient,
> >or all of those should be
> >  ($NL2SP; echo)
> >instead, to ensure a final newline.
> 
> easier to write:
> 
> foo=`echo X"$bar " | $SP2NL | $Xsed -e baz | $NL2SP`

Erm, after
       echo X"$bar "

the data ends with space-newline, after
                     | $SP2NL

that will be newline-newline, after
                              | $Xsed -e baz

that will still be the case, after
                                             | $NL2SP

it will be space-space.  Then, the shell is to rip off the final
newline, if any.  My point is that some shells may be confused iff
there is no final newline.  That's what the ($NL2SP; echo) would be for.

I simply don't know whether that is necessary for some broken shells.

Cheers,
Ralf