diff --git a/server/server.go b/server/server.go
index f99258c..d106b69 100644
--- a/server/server.go
+++ b/server/server.go
@@ -760,19 +760,19 @@ func (s *Server) read(cs *connState, fc *plan9.Fcall, ctx context.Context) *plan
 	// /complete: return per-fid result from previous write (offset 0-based)
 	if path == "/complete" {
 		s.log.Debug("Tread path=%q offset=%d count=%d", path, fc.Offset, fc.Count)
-		return s.readDNS(fc, f.completeResult)
+		return s.readDNS(fc, &f.completeResult)
 	}
 
 	// /generate: return per-fid result from previous write (offset 0-based)
 	if path == "/generate" {
 		s.log.Debug("Tread path=%q offset=%d count=%d", path, fc.Offset, fc.Count)
-		return s.readDNS(fc, f.generateResult)
+		return s.readDNS(fc, &f.generateResult)
 	}
 
 	// /route: return per-fid result from previous write (offset 0-based)
 	if path == "/route" {
 		s.log.Debug("Tread path=%q offset=%d count=%d", path, fc.Offset, fc.Count)
-		return s.readDNS(fc, f.routeResult)
+		return s.readDNS(fc, &f.routeResult)
 	}
 
 	s.log.Debug("Tread path=%q offset=%d count=%d", path, fc.Offset, fc.Count)
@@ -852,15 +852,16 @@ func (s *Server) readSlice(fc *plan9.Fcall, content []byte) *plan9.Fcall {
 
 // readDNS implements the Plan 9 /net/dns read pattern: the result is always
 // read from offset 0 regardless of the client's file position (which advances
-// after a write). This allows write-then-read on the same fd.
-func (s *Server) readDNS(fc *plan9.Fcall, content []byte) *plan9.Fcall {
+// after a write). Returns the content once, then returns EOF on subsequent reads.
+func (s *Server) readDNS(fc *plan9.Fcall, content *[]byte) *plan9.Fcall {
 	var data []byte
-	if len(content) > 0 {
+	if len(*content) > 0 {
 		end := int(fc.Count)
-		if end > len(content) {
-			end = len(content)
+		if end > len(*content) {
+			end = len(*content)
 		}
-		data = content[:end]
+		data = (*content)[:end]
+		*content = nil // consumed; next read returns EOF
 	}
 	return &plan9.Fcall{Type: plan9.Rread, Tag: fc.Tag, Count: uint32(len(data)), Data: data}
 }