From lurking on the qmail list for a while, I think this might be
supervise, which IIRC is used to check on daemons every <specified
time frame>, and respawn if necessary. Don't have a direct link for
you, but there's probably something hiding out on
http://www.qmail.org.

Joel Dudley wrote:
> 
> Can someone tell me what the "svc" command does?  I cannot find anything on
> the web or in my /doc or man pages.  Thanks.
>