From c48361ad9e84a3b8217111c03eda5d7820eebb2e Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Mon, 13 Sep 2021 19:33:56 +0200 Subject: [PATCH] Cygwin: fix inheritence of select_sem on write side of pipe select_sem gets created on the read side with inheritence settings depending on the O_CLOEXEC flag. Then it gets duplicated to the write side with unconditional inheritence. Fix that. Signed-off-by: Corinna Vinschen --- winsup/cygwin/fhandler_pipe.cc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/winsup/cygwin/fhandler_pipe.cc b/winsup/cygwin/fhandler_pipe.cc index 9b4255cfd..62cb1c0ec 100644 --- a/winsup/cygwin/fhandler_pipe.cc +++ b/winsup/cygwin/fhandler_pipe.cc @@ -790,7 +790,7 @@ fhandler_pipe::create (fhandler_pipe *fhs[2], unsigned psize, int mode) if (fhs[0]->select_sem) DuplicateHandle (GetCurrentProcess (), fhs[0]->select_sem, GetCurrentProcess (), &fhs[1]->select_sem, - 0, 1, DUPLICATE_SAME_ACCESS); + 0, !(mode & O_CLOEXEC), DUPLICATE_SAME_ACCESS); } debug_printf ("%R = pipe([%p, %p], %d, %y)", res, fhs[0], fhs[1], psize, mode);