HANDLE_FLAG_INHERIT is set to 0 on internal sockets

On Windows, HANDLE_FLAG_INHERIT is equivalent to
O_CLOEXEC on UNIX.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/ip.cpp b/src/ip.cpp
index 66177a7..e11ec45 100644
--- a/src/ip.cpp
+++ b/src/ip.cpp
@@ -57,6 +57,13 @@ xs::fd_t xs::open_socket (int domain_, int type_, int protocol_)
     errno_assert (rc != -1);
 #endif
 
+    //  On Windows, preventing sockets to be inherited by child processes is
+    //  done using SetHandleInformation function.
+#if defined XS_HAVE_WINDOWS && defined HANDLE_FLAG_INHERIT
+    BOOL brc = SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
+    win_assert (brc);
+#endif
+
     return s;
 }