From d89836fe51eeef4920439d6d2433f2ee6f37aec9 Mon Sep 17 00:00:00 2001
From: Brian Geffon <bgeffon@google.com>
Date: Thu, 3 Jan 2019 13:22:12 -0800
Subject: Add test for reopening socketpair end via procfs.

PiperOrigin-RevId: 227738801
Change-Id: Ic0c5d10c3b1f21b3f85ff9a661a55db77fab77b0
---
 test/syscalls/linux/socket_unix.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'test')

diff --git a/test/syscalls/linux/socket_unix.cc b/test/syscalls/linux/socket_unix.cc
index c60a965ae..8815ad849 100644
--- a/test/syscalls/linux/socket_unix.cc
+++ b/test/syscalls/linux/socket_unix.cc
@@ -14,6 +14,7 @@
 
 #include "test/syscalls/linux/socket_unix.h"
 
+#include <errno.h>
 #include <net/if.h>
 #include <stdio.h>
 #include <sys/ioctl.h>
@@ -1175,6 +1176,17 @@ TEST_P(UnixSocketPairTest, SocketShutdown) {
   EXPECT_EQ(data, absl::string_view(buf, 3));
 }
 
+// TODO: We should be returning ENXIO and NOT EIO.
+TEST_P(UnixSocketPairTest, DISABLED_SocketReopenFromProcfs) {
+  auto sockets = ASSERT_NO_ERRNO_AND_VALUE(NewSocketPair());
+
+  // Opening a socket pair via /proc/self/fd/X is a ENXIO.
+  for (const int fd : {sockets->first_fd(), sockets->second_fd()}) {
+    ASSERT_THAT(Open(absl::StrCat("/proc/self/fd/", fd), O_WRONLY),
+                PosixErrorIs(ENXIO, ::testing::_));
+  }
+}
+
 }  // namespace
 
 }  // namespace testing
-- 
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