ds: do_read: return 0 on EOF

It's conceivable that future users of this internal function
will want to distinguish between a client which failed due to
some network or HW error or a normal disconnect.

diff --git a/lib/PublicInbox/DS.pm b/lib/PublicInbox/DS.pm
index c1d76780686b2b371120376d56e0f98644cca6c5..472f845c7df92f6f3d6194ea1aeb6f9f6c2cfb1f 100644 (file)
--- a/lib/PublicInbox/DS.pm
+++ b/lib/PublicInbox/DS.pm
@@ -457,7 +457,7 @@ sub do_read ($$$;$) {
        } else {
                $self->close;
        }
-       undef;
+       $r; # undef or 0 (EOF)
 }
 
 # drop the socket if we hit unrecoverable errors on our system which