read command

[Wim]

Hi ,

I have a question.

I want to read in a file every time the next line is processed in sed. 
But I want to read command output before the output of the pattern space.

I managed to do this , if i first do: sed -e '$q' -e '0rfilename' -e 
'rfilename' but with this solution I have to repeat the same r command.

and the command 0,$rfilename doesn't work. is there any other solution 
with sed ?.

Kind regards,

Wim Stockman