From c025acbea84bdc5701d26b60504392dcffd8324b Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Thu, 27 Mar 2025 23:01:31 +0200
Subject: implemented dup

---
 internal/eventloop.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'internal/eventloop.go')

diff --git a/internal/eventloop.go b/internal/eventloop.go
index bb30764..3355c8b 100644
--- a/internal/eventloop.go
+++ b/internal/eventloop.go
@@ -198,6 +198,7 @@ func (e *eventLoop) syscallExit(exitEv event.Event, ch chan<- *event.Pair) {
 		return
 	}
 
+	// TODO: Benchmark, is a map faster than this large switch statement?
 	switch v := ev.EnterEv.(type) {
 	case *OpenEvent:
 		openEv := ev.EnterEv.(*OpenEvent)
@@ -240,6 +241,15 @@ func (e *eventLoop) syscallExit(exitEv event.Event, ch chan<- *event.Pair) {
 			ev.Recycle()
 			return
 		}
+		if ev.Is(SYS_ENTER_DUP) {
+			fdFile, ok := ev.File.(file.FdFile)
+			if !ok {
+				panic("expected a file.FdFile")
+			}
+			// Duplicating fd
+			newFd := int32(ev.ExitEv.(*RetEvent).Ret)
+			e.files[newFd] = fdFile.Dup(newFd)
+		}
 
 	case *NullEvent:
 		ev.Comm = e.comm(ev.EnterEv.GetTid())
-- 
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