Land #1358 - fix setting cloexec in socketpair shim

1 files changed, 4 insertions, 3 deletions

diff --git a/tests/compat/pipe2.c b/tests/compat/pipe2.c
index c0189db..3e79575 100644
--- a/tests/compat/pipe2.c
+++ b/tests/compat/pipe2.c
@@ -18,9 +18,10 @@ static int setfd(int fd, int flag)
 {
         int rc = -1;
         if (flag & FD_CLOEXEC) {
-                HANDLE h = (HANDLE)_get_osfhandle(fd);
-                if (h != NULL)
-                        rc = SetHandleInformation(h, HANDLE_FLAG_INHERIT, 0) == 0 ? -1 : 0;
+                /* fd is a Winsock SOCKET, not a CRT descriptor: use it as a
+                 * handle directly rather than translating with _get_osfhandle. */
+                HANDLE h = (HANDLE)(LONG_PTR)fd;
+                rc = SetHandleInformation(h, HANDLE_FLAG_INHERIT, 0) == 0 ? -1 : 0;
         }
         return rc;
 }