[glib] CLOEXEC fix for older FreeBSDs and OS X.

[Matthias Clasen <matthiasc src gnome org>]

commit 4382e8b876a3991e1be2827be76630e1b67b8e03
Author: Andrew Walton <awalton vmware com>
Date:   Tue Nov 12 13:04:49 2013 -0800

    CLOEXEC fix for older FreeBSDs and OS X.
    
    Some older POSIX-flavored operating systems may not have adopted
    O_CLOEXEC yet.
    
    See https://bugzilla.gnome.org/show_bug.cgi?id=712136.

 gio/gsubprocess.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/gio/gsubprocess.c b/gio/gsubprocess.c
index ca9b006..bced7a5 100644
--- a/gio/gsubprocess.c
+++ b/gio/gsubprocess.c
@@ -108,6 +108,12 @@
 #define O_BINARY 0
 #endif
 
+#ifndef O_CLOEXEC
+#define O_CLOEXEC 0
+#else
+#define HAVE_O_CLOEXEC 1
+#endif
+
 #define COMMUNICATE_READ_SIZE 4096
 
 /* A GSubprocess can have two possible states: running and not.
@@ -356,6 +362,10 @@ unix_open_file (const char  *filename,
       g_free (display_name);
       /* fall through... */
     }
+#ifndef HAVE_O_CLOEXEC
+  else
+    fcntl (my_fd, F_SETFD, FD_CLOEXEC);
+#endif
 
   return my_fd;
 }