X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/agedu/blobdiff_plain/e6fde1f73e5a102d808e0b2dc7f3367b7054dc5b..15e738400fc6d322b0caad7a5a7ef1dcaea5065f:/TODO

diff --git a/TODO b/TODO
index 2f5c2d3..6549737 100644
--- a/TODO
+++ b/TODO
@@ -1,15 +1,31 @@
 TODO list for agedu
 ===================
 
-Before it's non-embarrassingly releasable:
+ - we should munmap in all operating modes where we mmapped,
+   otherwise chaining them will run out of address space
 
- - now we have a configure framework, actually use it to:
-    * configure use of stat64
-    * configure use of Linux syscall magic replacing readdir
-       + later glibcs have fdopendir, hooray! So we can use that
-	 too, if it's available and O_NOATIME is too.
+ - we could still be using more of the information coming from
+   autoconf. Our config.h is defining a whole bunch of HAVE_FOOs for
+   particular functions (e.g. HAVE_INET_NTOA, HAVE_MEMCHR,
+   HAVE_FNMATCH). We could usefully supply alternatives for some of
+   these functions (e.g. cannibalise the PuTTY wildcard matcher for
+   use in the absence of fnmatch, switch to vanilla truncate() in
+   the absence of ftruncate); where we don't have alternative code,
+   it would perhaps be polite to throw an error at configure time
+   rather than allowing the subsequent build to fail.
+    + however, I don't see anything here that looks very
+      controversial; IIRC it's all in POSIX, for one thing. So more
+      likely this should simply wait until somebody complains.
 
-Future possibilities:
+ - it would be useful to support a choice of indexing strategies.
+   The current system's tradeoff of taking O(N log N) space in order
+   to be able to support any age cutoff you like is not going to be
+   ideal for everybody. A second more conventional mechanism which
+   allows the user to specify a number of fixed cutoffs and just
+   indexes each directory on those alone would undoubtedly be a
+   useful thing for large-scale users. This will require
+   considerable thought about how to make the indexers pluggable at
+   both index-generation time and query time.
 
  - IPv6 support in the HTTP server
     * of course, Linux magic auth can still work in this context; we