Dominic Raferd:
> On Thu, 16 Jan 2020 at 14:34, Wietse Venema <wie...@porcupine.org> wrote:
>
> > Dominic Raferd:
> > > Thanks Christian that was very helpful. I have it working now for
> > > postscreen and I think (but am waiting for an incoming instance) for
> > > smtpd. Weird
> > > that they have such different approaches (postscreen_dnsbl_reply_map and
> > > rbl_reply_maps). And I could not find a way to use pcre with
> > rbl_reply_maps
> > > because it throws a warning if I reference any variables such as
> > $rbl_code
> > > - but such variables do seem to work in a hash file.
> >
> > Use $$name instead of $name.
> >
> > As documented:
> >
> > TEXT SUBSTITUTION
> > Substitution of substrings (text that matches patterns inside
> > "()")
> > from the matched expression into the result string is requested
> > with
> > $1, $2, etc.; specify $$ to produce a $ character as output.
> > The
> > macros in the result string may need to be written as ${n} or
> > $(n) if
> > they aren't followed by whitespace.
> >
>
> Thanks Wietse. I had read that but I interpreted the text 'specify $$ to
> produce a $ character as output' as meaning that $$ would produce a
> hard-coded dollar sign, not a sign that could then be re-interpreted as the
> start of a variable. Perhaps the text could clarify this?
Oh ye of little faith. You can test my suggestion with the postmap command.
postmap -q 'search strinng here' pcre:/path/to/file
Wietse
