Sed question

[Mark Ovens]

Matthew Seaman wrote:

> On Thu, Apr 15, 2004 at 04:43:40PM +0100, Mark Ovens wrote:
>> Dave Tiger wrote:
>> 
>> >Hi Sam,
>> >
>> > cat filename | sed -e "s/domain.com-edit\/1s/^L^Mtext to add/" filename
>> >
>> 
>> You can't write to the file you're reading from, try:
>> 
>> mv filename filename.bu; cat filename.bu | sed
>> 's/\(domain.com-edit\)$/\1\nThis is new text/' > filename
>> 
>> All that is on one line of course.
> 
> If only.  Unfortunately FreeBSD sed(1) does not grok '\n' as a
> character escape for new-line:
> 

Duh! Yes, of course. I'd just been doing a similar thing, but using 
Cygwin (under Windows) where '\n' does work. Sorry for the noise.

Mark

>     % sed -e 's/\(domain.com-edit\)$/\1\nThis is new text/' <<E_O_T
>     ? Some text
>     ? Some more text
>     ? substitution after domain.com-edit
>     ? a bit more text
>     ? the last text of all
>     ? E_O_T
>     Some text
>     Some more text
>     substitution after domain.com-editnThis is new text
>     a bit more text
>     the last text of all
> 
> That just inserts a letter 'n'...  This is the way to do it:
> 
>     % sed -e '/domain.com-edit$/a\\
>     ? This is new text' <<E_O_T
>     ? Some text
>     ? Some more text
>     ? substitution after domain.com-edit
>     ? a bit more text
>     ? the last text of all
>     ? E_O_T
>     Some text
>     Some more text
>     substitution after domain.com-edit
>     This is new text
>     a bit more text
>     the last text of all
> 
> (Those ?'s are shell prompts, so don't type them in literally)
> 
> 	Cheers,
> 
> 	Matthew
>