From: Ian Lance Taylor <iant@golang.org>
Date: Tue, 24 Mar 2020 20:13:38 +0000 (-0700)
Subject: os/exec: for TestExtraFiles failure, print readlink of unexpected fd
X-Git-Tag: go1.15beta1~765
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=9f343b1942356e0c87c6994118be298f634e6b4d;p=gostls13.git

os/exec: for TestExtraFiles failure, print readlink of unexpected fd

For #25628

Change-Id: If1dce7ba9310e1418e67b9954c989471b775a28e
Reviewed-on: https://go-review.googlesource.com/c/go/+/225278
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
---

diff --git a/src/os/exec/exec_test.go b/src/os/exec/exec_test.go
index dce66c5c2e..91dd0a41ac 100644
--- a/src/os/exec/exec_test.go
+++ b/src/os/exec/exec_test.go
@@ -861,6 +861,9 @@ func TestHelperProcess(*testing.T) {
 			}
 			if got := f.Fd(); got != wantfd {
 				fmt.Printf("leaked parent file. fd = %d; want %d\n", got, wantfd)
+				fdfile := fmt.Sprintf("/proc/self/fd/%d", wantfd)
+				link, err := os.Readlink(fdfile)
+				fmt.Printf("readlink(%q) = %q, %v\n", fdfile, link, err)
 				var args []string
 				switch runtime.GOOS {
 				case "plan9":