[newlib-cygwin] Cygwin: AF_UNIX: Add fixup_after_exec method

[Corinna Vinschen <corinna at sourceware dot org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=7b1028974b529b22a20566c4fdf50440abefe725

commit 7b1028974b529b22a20566c4fdf50440abefe725
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Sat Mar 10 21:09:28 2018 +0100

    Cygwin: AF_UNIX: Add fixup_after_exec method
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/fhandler.h              |  1 +
 winsup/cygwin/fhandler_socket_unix.cc | 11 +++++++++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h
index 5ceedd9..2a3b366 100644
--- a/winsup/cygwin/fhandler.h
+++ b/winsup/cygwin/fhandler.h
@@ -900,6 +900,7 @@ class fhandler_socket_unix : public fhandler_socket
 	  : set_peer_sun_path (NULL, 0); }
   void set_cred ();
   void fixup_after_fork (HANDLE parent);
+  void fixup_after_exec ();
   void set_close_on_exec (bool val);
 
  public:
diff --git a/winsup/cygwin/fhandler_socket_unix.cc b/winsup/cygwin/fhandler_socket_unix.cc
index 9ac9b24..6e7d6f1 100644
--- a/winsup/cygwin/fhandler_socket_unix.cc
+++ b/winsup/cygwin/fhandler_socket_unix.cc
@@ -982,6 +982,8 @@ fhandler_socket_unix::set_cred ()
   peer_cred.gid = (gid_t) -1;
 }
 
+/* ========================== public methods ========================= */
+
 void
 fhandler_socket_unix::fixup_after_fork (HANDLE parent)
 {
@@ -997,6 +999,13 @@ fhandler_socket_unix::fixup_after_fork (HANDLE parent)
 }
 
 void
+fhandler_socket_unix::fixup_after_exec ()
+{
+  if (!close_on_exec ())
+    fixup_after_fork (NULL);
+}
+
+void
 fhandler_socket_unix::set_close_on_exec (bool val)
 {
   fhandler_base::set_close_on_exec (val);
@@ -1004,8 +1013,6 @@ fhandler_socket_unix::set_close_on_exec (bool val)
     set_no_inheritance (backing_file_handle, val);
 }
 
-/* ========================== public methods ========================= */
-
 fhandler_socket_unix::fhandler_socket_unix ()
 {
   set_cred ();