New os.c-cygwin (and some minor WishList change I forgot to commit).

[exim.git] / doc / doc-misc / WishList

diff --git a/doc/doc-misc/WishList b/doc/doc-misc/WishList
index 55aa19d9dfbda11cf7bccead2b743a4396db08c9..3f70a9d643a3ae8b45f715f4e2c8ba6f31177a5c 100644 (file)
--- a/doc/doc-misc/WishList
+++ b/doc/doc-misc/WishList
@@ -1,4 +1,4 @@
-$Cambridge: exim/doc/doc-misc/WishList,v 1.61 2006/03/02 11:24:25 ph10 Exp $
+$Cambridge: exim/doc/doc-misc/WishList,v 1.64 2006/03/08 09:43:10 ph10 Exp $
 
 EXIM 4 WISH LIST
 ----------------
@@ -1442,12 +1442,6 @@ this reason, I don't really like this idea.
 (236) 02-Feb-04 S  String in local_scan that's added to the binary version string
 ------------------------------------------------------------------------------
 
-(237) 02-Feb-04 M  Add_header in ACLs because "message" is overloaded
-
-This would be useful for verbs where "message" is an error message. See also
-333.
-------------------------------------------------------------------------------
-
 (238) 05-Feb-04 S  ${address to handle multiple addresses
 
 At present, ${address expects to see just one address. An extension would let
@@ -1905,7 +1899,7 @@ headers should be re-planned and re-implemented in a more consistent manner.
 These are the main previous items:
 
 Exim 3 Wish List: 41, 85, 149, 187.
-Exim 4 Wish List: 55, 62, 63, 160, 212, 237, 270, 314, 328.
+Exim 4 Wish List: 55, 62, 63, 160, 212, 270, 314, 328.
 ------------------------------------------------------------------------------
 
 (334) 07-Jun-05 M Support for messages larger than 2G
@@ -1969,6 +1963,34 @@ should also defer, for compatibility with ACLs.
 
 The natural syntax for this would be to use a regex, like this:
 ${lookup regex{/some/file regex}{found-string}{not-found-string}}
+However, it would be natural to want to use $1 etc in the found-string; this
+would be hard because of the lookup caching (if repeated, the lookup won't
+actually be done and therefore the numerical variables won't be set), and in
+any case, even without caching (and it could, I suppose, be disabled for this
+lookup) those variables are not in the right storage pool even if they were
+preserved after the lookup.
+
+An alternative approach might be to implement something like this:
+
+  ${scanfile{/some/file}{sub-expression}}
+
+where the sub-expression is expanded for every line in the file, with each line
+in turn being put into $value. This is like a conditional ${readfile, and in
+fact ${readfile could be written using ${scanfile. It would be nice to find a
+way of stopping the scan once something has happened. The only thing I can
+think of is to invent a variable that changes when scanning a line generates
+some non-null text, and then always to stop on a forced failure. That would
+allow expressions like this:
+
+  ${scanfile{/some/file}
+    {
+    ${if eq{$generated}{}{${if match{regex}{$value}{something}}} fail}
+    }}
+
+It's all rather clumsy. Once a line has matched and generated some text, the
+next iteration would stop the scan. Another thought: maybe use $scanline
+instead of $value (to save confusion) and have $scantext containing everything
+that's been generated so far. That sounds pretty flexible.
 ------------------------------------------------------------------------------
 
 (344) 10-Oct-05 M Make debug_print work in authenticators
@@ -1997,13 +2019,6 @@ code, because of caching. Probably means we have to invent ewildlsearch and
 enwildlsearch.
 ------------------------------------------------------------------------------
 
-(348) 17-Nov-05 S Option to allow AUTH when not advertised.
-
-It seems that there are clients that send AUTH when it hasn't been advertised,
-some even after HELO, not even EHLO. Sigh. Possibly this should be an ACL
-control, to enable it to be restricted to certain hosts.
-------------------------------------------------------------------------------
-
 (350) 28-Feb-06 S Additional errors for retry rules
 
 (i) Unexpected connection close; (ii) mail_4xx.