Alex Zbyslaw wrote:
Tim Daneliuk wrote:
2) Better still is there some sort of "include" mechanism where I could
keep a flat file of public host information for use by db.external,
but include it into db.internal.
I don't think there is, but let someone who uses bind more than I do
give a definitive on that :-)
What you *can* do, irrespective of bind version, is to have two files
which you pre-process with m4, and have a third file which m4 includes
on both the others.
So you start with:
internal.M4 which includes "shared"
external.M4 which also includes "shared"
shared which gets included in the other two.
Then m4 internal.M4 > internal and m4 external.M4 -> external.
Bind then loads internal and external.
A reasonable and very Unix-ish solution, certainly. Though, I think
the subsequent post on this thread regarding $INCLUDE is probably more
elegant ;)
Alternatively you could start with one M4 file which uses lots of ifdefs
for the non-shared portions. The create internal and external by
specifying different definitions to m4. e.g. m4 -D _TYPE=EXTERNAL or m4
-D _TYPE=INTERNAL.
For a problem with small differences between two files, this is a better
solution, but not what I'd do in this case.
Me either - conditional content gets clumsy to maintain in a big hurry.
Whole process can be easily controlled with a Makefile (including any
restarts).
--Alex
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