[PATCH 6/7] hurd: Respect existing FD_CLOEXEC in S_msg_set_fd

[Sergey Bugaev <bugaevc@gmail.com>]

If the process has set the close-on-exec flag for the file descriptor,
it expects the file descriptor to get closed on exec, even if we replace
what the file descriptor refers to.

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
---
 hurd/hurdmsg.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/hurd/hurdmsg.c b/hurd/hurdmsg.c
index 896fb87c..8fde1f53 100644
--- a/hurd/hurdmsg.c
+++ b/hurd/hurdmsg.c
@@ -323,7 +323,13 @@ _S_msg_set_fd (mach_port_t msgport, mach_port_t auth,
   AUTHCHECK;
 
   /* We consume the reference if successful.  */
-  err = HURD_FD_USE (which, (_hurd_port2fd (descriptor, port, 0), 0));
+  err = HURD_FD_USE (which,
+		     ({
+		       int flags = (descriptor->flags & FD_CLOEXEC)
+				   ? O_CLOEXEC : 0;
+		       _hurd_port2fd (descriptor, port, flags);
+		       0;
+		     }));
   if (err)
     return err;
 
-- 
2.40.1