logging to a pipe?

Hello,

in the logging definition for a channel I found only syslog and file.
With the file-option, I was hoping that it would log to a script when using

file "|/var/tmp/logger.pl";

but it doesn't:

config: error: logging channel 'my_file' file '|/var/tmp/logger.pl':
file not found

Is someone working on a pipe-option? Is there a general reason not to
implement (it's possible in Apache).

Regards
Marten