Three-Line service comments

[Tim Auckland]

A common format for labeling services in, eg, inetd.conf is to add
a comment group just before the service.

For example:

#
# GNATS
#
support stream tcp nowait gnats /usr/libexec/gnats/gnatsd gnatsd

If I have cfengine add and delete this service according to class,
then I would like it to add and delete the comment as well.  I could
just have cfengine blindly remove the preceeding three lines, but
this seems rather unsafe.  I would rather make at least some attempt
to make sure they contained the comment I wish to delete.

Here's an attempt, but it's rather ugly.  Is there a better way?

editfiles:
   GnatsServers::
   { /etc/inet/inetd.conf
      UnCommentLinesContaining "gnatsd"
      BeginGroupIfNoLineContaining "gnatsd"
         Append "#"
         Append "# GNATS"
         Append "#"
         Append "support stream tcp nowait gnats
/usr/libexec/gnats/gnatsd gnatsd"
      EndGroup      
   }

   !GnatsServers::
   { /etc/inet/inetd.conf
      
      DeleteLinesContaining "gnatsd"
      ResetSearch "1"
      LocateLineMatching "# GNATS$"
      DeleteNLines "1"
      BeginGroupIfNoMatch "^#$"
         LocateLineMatching "!Abort!"
      EndGroup
      DeleteNLines "1"
      IncrementPointer "-1"
      BeginGroupIfNoMatch "^#$"
         LocateLineMatching "!Abort!"
      EndGroup
      DeleteNLines "1"
      CatchAbort

   }

--
Tim.Auckland@Procket.com